Managing fifth generation (5G) new radio (NR) antenna switching concurrency

Abstract

A method of wireless communication at a user equipment (UE) is presented. The UE may include one or more antennas shared between the first network connection and the second network connection in the dual connectivity mode. The method includes reporting a first sounding reference signal (SRS) antenna switching capability to a base station. The method further includes transmitting the SRS to the base station via a second SRS antenna switching capability when the first network connection is prior to the second network connection, where the second SRS antenna switching capability is reduced relative to the first SRS antenna switching capability.

Description

[0001] This application is a divisional application of a patent application filed on March 12, 2021, entitled “Managing Fifth Generation (5G) New Radio (NR) Antenna Switching Concurrency” and application number 202180022328.1.

[0002] Cross-references

[0003] This patent application claims the benefit of priority of the following applications: U.S. Provisional Patent Application No. 63 / 005,767, filed by Gopal et al. on April 6, 2020, entitled “MANAGING FIFTH GENERATION (5G) NEW RADIO (NR) ANTENNA-SWITCHING CONCURRENCY”; and U.S. Patent Application No. 17 / 199,322, filed by Gopal et al. on March 11, 2021, entitled “MANAGING FIFTH GENERATION (5G) NEW RADIO (NR) ANTENNA-SWITCHING CONCURRENCY”; each of all of the above applications is assigned to the assignee of this application, and each of all of the above applications is expressly incorporated herein by reference. Technical Field

[0004] Generally speaking, aspects of the present disclosure relate to wireless communications, and more specifically, aspects of the present disclosure relate to techniques and apparatus for managing fifth generation (5G) new radio (NR) sounding reference signal (SRS) antenna switching concurrency. Background Art

[0005] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard released by the Third Generation Partnership Project (3GPP).

[0006] A wireless communication network may include multiple base stations that can support communications for multiple user equipments (UEs). A UE may communicate with a base station via downlink and uplink communications. A downlink (or forward link) refers to a communication link from a base station to a UE, and an uplink (or reverse link) refers to a communication link from a UE to a base station. As will be described in more detail herein, a base station may be referred to as a Node B, gNB, access point (AP), radio head, transmit receive point (TRP), new radio (NR) base station, 5G Node B, etc.

[0007] The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user devices to communicate at city, country, region, and even global levels. NR (which may also be referred to as 5G) is an enhancement set to the LTE mobile standard released by the Third Generation Partnership Project (3GPP). NR is designed to better integrate with other open standards by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink, using CP-OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink, so as to better support mobile broadband Internet access, as well as support beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to be able to fully understand the above-mentioned features of the present disclosure, a specific description can be obtained by referring to various aspects (some of which are shown in the accompanying drawings). However, it should be noted that the accompanying drawings only illustrate certain aspects of the present disclosure and are therefore not considered to limit the scope of the present disclosure, as the description may allow for other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0009] Figure 1 is a block diagram conceptually illustrating an example of a wireless communication system in accordance with various aspects of the present disclosure.

[0010] Figure 2 is a block diagram conceptually illustrating an example of a base station in communication with a user equipment (UE) in a wireless communication network according to various aspects of the present disclosure.

[0011] Figure 3 , Figure 4A , Figure 4B , Figure 4C , Figure 4D and Figure 4E is a diagram illustrating an example of NR SRS antenna switching according to various aspects of the present disclosure.

[0012] Figure 5 is a block diagram illustrating NR subframes and LTE subframes according to aspects of the present disclosure.

[0013] Figure 6 and Figure 7 A block diagram of a device supporting a method for managing fifth generation (5G) New Radio (NR) sounding reference signal (SRS) antenna switching concurrency in an Evolved Universal Mobile Telecommunications Service (E-UMTS) Terrestrial Radio Access Network (E-UTRAN) New Radio Dual Connectivity (ENDC) according to various aspects of the present disclosure is shown.

[0014] Figure 8 A block diagram of a communication manager supporting a method for managing 5G NR SRS antenna switching concurrency in an ENDC in accordance with aspects of the present disclosure is shown.

[0015] Fig. 9 A diagram of a system including devices supporting a method for managing 5G NR SRS antenna switching concurrency in an ENDC in accordance with aspects of the present disclosure is shown.

[0016] Figures 10 to 12 A flow chart illustrating a method for supporting a method for managing 5G NRSRS antenna switching concurrency in an ENDC in accordance with aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0017] The following is a more complete description of various aspects of the present disclosure with reference to the accompanying drawings. However, the present disclosure can be embodied in many different forms and should not be construed as being limited to any specific structure or function presented throughout the present disclosure. More specifically, these aspects are provided so that the present disclosure will be thorough and complete, and the scope of the present disclosure will be fully conveyed to those skilled in the art. Based on the teachings herein, it should be understood by those skilled in the art that the scope of the present disclosure is intended to cover any aspect of the present disclosure, whether the aspect is implemented independently of any other aspect of the present disclosure or implemented in combination with any other aspect. For example, using any number of aspects described, a device can be implemented or a method can be implemented. In addition, the scope of the present disclosure is intended to cover such a device or method implemented using other structures, functions, or structures and functions other than or different from the various aspects of the present disclosure described. It should be understood that any aspect of the disclosed present disclosure can be embodied by one or more elements of the claims.

[0018] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0019] It should be noted that while various aspects may be described using terminology typically associated with 5G and later wireless technologies, various aspects of the present disclosure may be applicable to communication systems based on other generations of communication systems, such as and including 3G and / or 4G technologies).

[0020] Figure 1 An example of a wireless communication system 100 supporting a method for managing fifth generation (5G) new radio (NR) sounding reference signal (SRS) antenna switching concurrency according to aspects of the present disclosure is shown. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a long term evolution (LTE) network, an improved LTE (LTE-A) network, an LTE-A professional network, or a new radio (NR) network. In some examples, the wireless communication system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission-critical) communications, low-latency communications, or communications with low-cost and low-complexity devices, or any combination thereof.

[0021] Base stations 105 may be dispersed throughout a geographic area to form wireless communication system 100, and may be devices of different forms or capabilities. Base stations 105 and UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110 over which UEs 115 and base stations 105 may establish one or more communication links 125. Coverage area 110 may be an example of a geographic area over which base stations 105 and UEs 115 may support transmission of signals according to one or more radio access technologies.

[0022] UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary, mobile, or both at different times. UEs 115 may be devices of different forms or with different capabilities. Figure 1Some example UEs 115 are shown in FIG. 1. The UEs 115 described herein can communicate with various types of devices, such as other UEs 115, base stations 105, or network devices (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network devices), such as Figure 1 shown.

[0023] The base stations 105 may communicate with the core network 130, or communicate with each other, or perform both operations. For example, the base stations 105 may interface with the core network 130 via one or more backhaul links 132 (e.g., via S1, N2, N3 or other interfaces). The base stations 105 may communicate with each other directly (e.g., directly between the base stations 105) on the backhaul link 120 (e.g., via X2, Xn or other interfaces), or communicate with each other indirectly (e.g., via the core network 130), or perform both operations. In some examples, the backhaul link 120 may be or include one or more wireless links.

[0024] One or more of the base stations 105 described herein may include or may be referred to by those skilled in the art as a base station transceiver, a wireless base station, an access point, a wireless transceiver, a Node B, an evolved Node B (eNB), a next generation Node B, or a Gigabit Node B (any of which may be referred to as a gNB), a Home Node B, a Home Evolved Node B, or some other appropriate terminology.

[0025] UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a user device, or some other appropriate terminology, where a "device" may also be referred to as a unit, a station, a terminal, or a client, as well as other examples. UE 115 may also include or be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, as well as other examples, which may be implemented in various items such as appliances, or vehicles, meters, and other examples.

[0026] The UE 115 described herein is capable of communicating with various types of devices, such as other UEs 115, which may sometimes act as relays, as well as base stations 105 and network devices, including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, such as Figure 1 as shown in .

[0027] The UE 115 and the base station 105 can communicate with each other wirelessly via one or more communication links 125 on one or more carriers. The term "carrier" refers to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication link 125. For example, the carrier used for the communication link 125 may include a portion of a radio frequency spectrum band (e.g., a bandwidth portion (BWP)) that operates according to one or more physical layer channels of a given radio access technology (e.g., LTE, LTE-A, LTE-A professional, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating the operation of the carrier, user data, or other signaling. The wireless communication system 100 may support communication with the UE 115 using carrier aggregation or multi-carrier operation. According to the carrier aggregation configuration, the UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation may be used with both frequency division duplex (FDD) component carriers and time division duplex (TDD) component carriers.

[0028] In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling that coordinates the operation of other carriers. A carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute Radio Frequency Channel Number (EARFCN)) and may be placed according to a channel grid to be discovered by a UE 115. A carrier may operate in a standalone mode, where a UE 115 performs initial acquisition and connection via a carrier, or a carrier may operate in a non-standalone mode, where a different carrier (e.g., of the same or different radio access technology) is used to anchor the connection.

[0029] The communication link 125 shown in the wireless communication system 100 may include an uplink transmission from the UE 115 to the base station 105, or a downlink transmission from the base station 105 to the UE 115. A carrier may carry downlink or uplink communications (e.g., in FDD mode) or may be configured to carry both downlink and uplink communications (e.g., in TDD mode).

[0030] A carrier may be associated with a particular bandwidth of a radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as a "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of a plurality of determined bandwidths of a carrier for a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). A device of the wireless communication system 100 (e.g., a base station 105, a UE 115, or both) may have a hardware configuration that supports communication on a particular carrier bandwidth, or may be configurable to support communication on one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or a UE 115 that supports simultaneous communication via carriers associated with a plurality of carrier bandwidths. In some examples, each served UE 115 may be configured to operate on a portion (e.g., a subband, a BWP) or all of a carrier bandwidth.

[0031] The signal waveform transmitted on the carrier may be composed of multiple subcarriers (e.g., using multicarrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing MCM techniques, a resource element may be composed of a symbol period (e.g., the duration of a modulation symbol) and a subcarrier, where the symbol period and the subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Therefore, the more resource elements received by UE 115 and the higher the order of the modulation scheme, the higher the data rate for UE 115 can be. Wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers may further increase the data rate or data integrity for communication with UE 115.

[0032] One or more digital schemes for a carrier may be supported, where the digital scheme may include a subcarrier spacing (Δf) and a cyclic prefix. A carrier may be divided into one or more BWPs with the same or different digital schemes. In some examples, a UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier is active at a given time, and communications for a UE 115 may be limited to the one or more active BWPs.

[0033] The basic time unit (which may be referred to as T s =1 / (Δf max ·N f )) seconds sampling period, where Δf maxIt can represent the maximum supported subcarrier spacing, and N f The time intervals for the base station 105 or the UE 115 may be expressed as multiples of a maximum supported discrete Fourier transform (DFT) size). The time intervals of the communication resources may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0034] Each frame may include multiple consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, the frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into multiple time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include multiple symbol periods (e.g., depending on the length of the cyclic prefix added in front of each symbol period). In some wireless communication systems 100, the time slots may be further divided into multiple micro-time slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., N f The duration of a symbol period may depend on the subcarrier spacing or the operating frequency band.

[0035] A subframe, slot, mini-slot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in a burst of a shortened TTI (sTTI)).

[0036] Physical channels may be multiplexed on a carrier according to various techniques. For example, one or more of a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique may be used to multiplex physical control channels and physical data channels on a downlink carrier. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by a plurality of symbol periods and may extend over a system bandwidth or a subset of a system bandwidth of a carrier. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more of the UEs 115 may monitor or search a control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. The aggregation level for a control channel candidate may refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with coding information for a control information format having a given payload size. The search space sets may include a common search space set configured for transmitting control information to multiple UEs 115 and a UE-specific search space set for transmitting control information to a specific UE 115 .

[0037] Each base station 105 can provide communication coverage via one or more cells (e.g., macro cells, small cells, hot spots or other types of cells, or any combination thereof). The term "cell" can refer to a logical communication entity used to communicate with the base station 105 (e.g., on a carrier), and can be associated with an identifier (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID) or other identifier) ​​used to distinguish adjacent cells. In some examples, a cell can also refer to a geographic coverage area 110 or a portion of a geographic coverage area 110 (e.g., a sector) on which a logical communication entity operates. Depending on various factors (such as the capabilities of the base station 105), the range of such a cell can range from a smaller area (e.g., a structure, a subset of a structure) to a larger area. For example, a cell can be or can include a building, a subset of a building, or an external space between or overlapping geographic coverage areas 110, as well as other examples.

[0038] A macro cell typically covers a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by a UE 115 with a service subscription to a network provider that supports the macro cell. A small cell may be associated with a lower power base station 105 than a macro cell, and the small cell may operate in a frequency band that is the same or different (e.g., licensed, unlicensed) from the macro cell. A small cell may provide unrestricted access to a UE 115 with a service subscription to a network provider, or may provide restricted access to a UE 115 associated with a small cell (e.g., a UE 115 in a closed subscriber group (CSG), a UE 115 associated with a user in a residence or office). A base station 105 may support one or more cells, and may also support the use of one or more component carriers to communicate on one or more cells.

[0039] In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)) that may provide access to different types of devices.

[0040] In some examples, base stations 105 may be mobile and, therefore, provide communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105. The wireless communication system 100 may include, for example, a heterogeneous network in which different types of base stations 105 provide coverage for respective geographic coverage areas 110 using the same or different radio access technologies.

[0041] The wireless communication system 100 can be configured to support ultra-reliable communication or low-latency communication, or various combinations thereof. For example, the wireless communication system 100 can be configured to support ultra-reliable low-latency communication (URLLC) or mission-critical communication. UE115 can be designed to support ultra-reliable, low-latency or critical functions (e.g., mission-critical functions). Ultra-reliable communication can include private communication or group communication, and can be supported by one or more mission-critical services (such as mission-critical push-to-talk (MCPTT), mission-critical video (MCVideo), or mission-critical data (MCData). Support for mission-critical functions can include prioritization of services, and mission-critical services can be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission-critical, and ultra-reliable low-latency can be used interchangeably in this article.

[0042] In some examples, UE 115 can also communicate directly with other UE 115 on a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115 utilizing D2D communication can be within a geographic coverage area 110 of a base station 105. Other UEs 115 in such a group can be outside the geographic coverage area 110 of the base station 105, or otherwise unable to receive transmissions from the base station 105. In some examples, multiple groups of UEs 115 communicating via D2D communication can utilize a one-to-many (1:M) system, wherein each UE 115 transmits to each other UE 115 in the group. In some examples, the base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between UEs 115 without involving the base station 105.

[0043] In some systems, the D2D communication link 135 can be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, the vehicle can communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination of these items. The vehicle can use signals to send information related to traffic conditions, signal scheduling, weather, safety, emergency situations, or any other information related to the V2X system. In some examples, the vehicle in the V2X system can communicate with roadside infrastructure (such as a roadside unit), or communicate with the network via one or more network nodes (e.g., base station 105) using vehicle-to-network (V2N) communication, or communicate with both.

[0044] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connection, and other access, routing or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), which may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function unit (AMF)) for managing access and mobility and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function unit (UPF)) for routing or interconnecting packets to an external network. The control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management for UE 115 served by a base station 105 associated with the core network 130. User IP packets may be transmitted via a user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to an IP service 150 for one or more network operators. IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0045] Some of the network devices (e.g., base station 105) may include subcomponents such as access network entity 140, which may be an example of an access node controller (ANC). Each access network entity 140 may communicate with UE 115 through one or more other access network transport entities (which may be referred to as radio heads, smart radio heads, or transmit / receive points (TRPs)). Each access network transport entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANC) or merged into a single network device (e.g., base station 105).

[0046] The wireless communication system 100 may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Typically, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length. UHF waves may be blocked or redirected by buildings and environmental features, but the waves may be sufficient to penetrate structures for macro cells to provide service to UEs 115 located indoors. Transmissions using UHF waves may be associated with smaller antennas and shorter distances (e.g., less than 100 kilometers) compared to transmissions using smaller frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0047] The wireless communication system 100 can utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 can employ license assisted access (LAA), LTE unlicensed (LTE-U) wireless access technology, or NR technology in an unlicensed band (such as the 5 GHz industrial, scientific, and medical (ISM) band). When operating in an unlicensed radio frequency spectrum band, devices (such as base stations 105 and UEs 115) can employ carrier sensing for conflict detection and avoidance. In some examples, operations in unlicensed bands can be based on a carrier aggregation configuration in combination with component carriers operating in a licensed band (e.g., LAA). Operations in the unlicensed spectrum can include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, as well as other examples.

[0048] The base station 105 or UE 115 may be equipped with multiple antennas, which may be used to employ technologies such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of the base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels (which may support MIMO operations or transmit or receive beamforming). For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, the antennas or antenna arrays associated with the base station 105 may be located at different geographical locations. The base station 105 may have an antenna array having multiple rows and columns of antenna ports that the base station 105 may use to support beamforming for communications with the UE 115. Similarly, the UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals sent via the antenna ports.

[0049] The base station 105 or UE 115 can use MIMO communication to exploit multipath signal propagation and improve spectral efficiency by sending or receiving multiple signals via different spatial layers. Such a technology may be referred to as spatial multiplexing. For example, a transmitting device may send multiple signals via different antennas or different combinations of antennas. Similarly, a receiving device may receive multiple signals via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO technology includes single-user MIMO (SU-MIMO) (where multiple spatial layers are sent to the same receiving device) and multi-user MIMO (MU-MIMO) (where multiple spatial layers are sent to multiple devices).

[0050] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting device or a receiving device (e.g., a base station 105, a UE 115) to form or direct an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming can be achieved by combining signals transmitted via antenna elements of an antenna array so that some signals propagating in a specific orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals transmitted via antenna elements may include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to signals carried via antenna elements associated with the device. Adjustments associated with each of the antenna elements may be defined by a set of beamforming weights associated with a specific orientation (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0051] As part of the beamforming operation, the base station 105 or the UE 115 may use beam scanning techniques. For example, the base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communications with the UE 115. The base station 105 may send some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) multiple times in different directions. For example, the base station 105 may send signals based on different sets of beamforming weights associated with different transmission directions. Transmissions in different beam directions may be used (e.g., by a transmitting device (such as the base station 105) or by a receiving device (such as the UE 115)) to identify a beam direction for subsequent transmission or reception by the base station 105.

[0052] Base station 105 may transmit some signals (e.g., data signals associated with a particular receiving device (e.g., UE 115)) in a single beam direction (e.g., a direction associated with the receiving device). In some examples, the beam direction associated with transmission along the single beam direction may be determined based on signals transmitted in one or more beam directions. For example, UE 115 may receive one or more of the signals transmitted by base station 105 in different directions and may report to base station 105 an indication of the signal received by UE 115 having the highest signal quality or otherwise acceptable signal quality.

[0053] In some examples, transmissions by a device (e.g., by a base station 105 or a UE 115) may be performed using multiple beam directions, and the device may generate a combined beam for transmission (e.g., from the base station 105 to the UE 115) using a combination of digital precoding or radio frequency beamforming. The UE 115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across the system bandwidth or one or more subbands. The base station 105 may send reference signals (e.g., cell-specific reference signals (CRS), channel state information reference signals (CSI-RS)) that may or may not be precoded. The UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type of codebook, a linear combination type of codebook, a port selection type of codebook). Although these techniques are described with reference to signals sent by base station 105 in one or more directions, UE 115 may employ similar techniques to send signals multiple times in different directions (e.g., to identify a beam direction for subsequent transmission or reception by UE 115) or to send signals in a single direction (e.g., to send data to a receiving device).

[0054] When receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from the base station 105, the receiving device (e.g., UE 115) can try multiple reception configurations (e.g., directional listening). For example, the receiving device can try multiple reception directions by receiving via different antenna subarrays, by processing the received signals according to different antenna subarrays, by receiving according to different reception beamforming weight sets applied to the signals received at multiple antenna elements of the antenna array (e.g., different directional listening weight sets), or by processing the received signals according to different reception beamforming weight sets applied to the signals received at multiple antenna elements of the antenna array (any of the above operations may be referred to as "listening" according to different reception configurations or reception directions). In some examples, the receiving device can use a single reception configuration to receive along a single beam direction (e.g., when receiving a data signal). A single receive configuration may be aligned on a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or otherwise acceptable signal quality based on listening according to multiple beam directions).

[0055] The wireless communication system 100 can be a packet-based network operated according to a layered protocol stack. In the user plane, the communication at the bearer or packet data convergence protocol (PDCP) layer can be based on IP. The radio link control (RLC) layer can perform packet segmentation and reorganization to transmit on a logical channel. The medium access control (MAC) layer can perform priority processing and multiplexing of logical channels to transport channels. The MAC layer can also use error detection technology, error correction technology, or both to support retransmission at the MAC layer to improve link efficiency. In the control plane, the radio resource control (RRC) protocol layer can provide the establishment, configuration and maintenance of the RRC connection (which supports radio bearers for user plane data) between the UE 115 and the base station 105 or the core network 130. At the physical layer, the transport channel can be mapped to the physical channel.

[0056] UE 115 and base station 105 can support retransmission of data to increase the possibility that the data is successfully received. Hybrid automatic repeat request (HARQ) feedback is a technology for increasing the possibility that data is correctly received on communication link 125. HARQ can include a combination of error detection (e.g., using cyclic redundancy check (CRC)), forward error correction (FEC) and retransmission (e.g., automatic repeat request (ARQ)). HARQ can improve the throughput at the MAC layer under poor radio conditions (e.g., low signal and noise conditions). In some examples, the device can support the same time slot HARQ feedback, wherein the device can provide HARQ feedback for data received in the previous symbol in the time slot in a specific time slot. In some other cases, the device can provide HARQ feedback in subsequent time slots or according to some other time interval.

[0057] In some aspects, the UE 115 and the base station 105 of the wireless communication system 100 may support a technique for managing SRS antenna switching concurrency. Specifically, the UE 115 of the wireless communication system 100 may be configured to determine whether to use the maximum SRS antenna switching capability supported by the UE 115 or the reduced SRS antenna switching capability to send the SRS. In some cases, when operating in an Evolved UMTS (Universal Mobile Telecommunications Service) Terrestrial Radio Access Network (E-UTRAN) New Radio Dual Connectivity (ENDC) operating mode, the UE 115 may be configured to determine whether to use the maximum or reduced antenna switching capability to send the SRS based on the relative priority of LTE communication and NR communication (e.g., based on the relative priority of the first (LTE) network connection and the second (NR) network connection). According to some implementations, when the NR network connection takes precedence over the LTE network connection, the UE 115 may send the SRS with the maximum SRS antenna switching capability. Conversely, according to some implementations, when the LTE network connection takes precedence over the NR network connection, the UE 115 may send the SRS with the reduced SRS antenna switching capability.

[0058] In some aspects, the UE 115 may be configured to determine the relative priority of the LTE and NR network connections based on one or more characteristics or parameters associated with each respective network connection. The parameters associated with the network connections that may be used to determine the relative priority of the network connections may include, but are not limited to: an antenna switching diversity (ASDIV) configuration implemented by the UE 115, a prioritization rule or policy, a call type (e.g., a high priority call) performed on the respective network connection, uplink and / or downlink activity on the respective network connection, an uplink / downlink grant rate on the respective network connection, an SNR of the respective network connection, a power headroom (PHR) metric of the respective network connection, a number of fault messages (e.g., RACH Msg 1, RACH Msg 3, scheduling requests) associated with the respective network connection, or any combination thereof.

[0059] The techniques described herein may enable improved SRS transmission in the context of a UE 115 operating in an ENDC mode of operation. Specifically, the techniques described herein may enable a UE 115 to determine the relative priority of LTE and NR network connections, which may be used to determine the SRS antenna switching capabilities that should be employed to transmit SRS. By customizing the SRS antenna switching capabilities based on the relative priority of the network connections, the techniques described herein may improve the efficiency of SRS transmissions while reducing or eliminating LTE communication interruptions due to SRS transmissions.

[0060] Figure 2 Base station 205 and UE 215 (which may be Figure 12. Block diagram of design 200 of a base station in a base station and a UE in a UE. Base station 205 may be equipped with T antennas 234-1 through 234-t, and UE 215 may be equipped with R antennas 252-1 through 252-r, where in general, T≥1 and R≥1.

[0061] At the base station 205, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for the UE based at least in part on the MCS selected for each UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS)) and synchronization signals (e.g., primary synchronization signals (PSS) and secondary synchronization signals (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232-1 to 232-t. Each modulator 232 may process a corresponding output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232-1 to 232-t may be transmitted via T antennas 234-1 to 234-t, respectively. According to various aspects described in more detail below, a synchronization signal may be generated using position coding to transmit additional information.

[0062] At UE 215, antennas 252-1 to 252-r can receive downlink signals from base station 205 and / or other base stations, and can provide received signals to demodulators (DEMOD) 254-1 to 254-r, respectively. Each demodulator 254 can adjust (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 can further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. MIMO detector 256 can obtain received symbols from all R demodulators 254-1 to 254-r, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. Receive processor 258 can process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 215 to data sink 260, and provide decoded control information and system information to controller / processor 280. The channel processor may determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), CQI, etc. In some aspects, one or more components of the UE 215 may be included in a housing.

[0063] On the uplink, at the UE 215, a transmit processor 264 may receive and process data from a data source 262 and control information from a controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 (if applicable), further processed by modulators 254-1 through 254-r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 205. At the base station 205, uplink signals from the UE 215 and other UEs may be received by the antenna 234, processed by the demodulator 254, detected by the MIMO detector 236 (if applicable), and further processed by the receive processor 238 to obtain decoded data and control information transmitted by the UE 215. The receive processor 238 may provide decoded data to a data sink 239 and provide decoded control information to a controller / processor 240. The base station 215 may include a communication unit 244 and communicate with the network controller 225 via the communication unit 244. The network controller 225 may include a communication unit 294, a controller / processor 290, and a memory 292.

[0064] The controller / processor 240 of the base station 205, the controller / processor 280 of the UE 215, and / or Figure 2Any other component in the system may perform one or more techniques associated with nonlinear machine learning, as described in more detail elsewhere. For example, the controller / processor 240 of the base station 205, the controller / processor 280 of the UE 215, and / or Figure 2 Any other component in may perform or direct e.g. Figure 10 to Figure 12 The processes and / or operations of other processes as described. Memories 242 and 282 may store data and program codes for base station 205 and UE 215, respectively. Scheduler 246 may schedule UEs for data transmission on the downlink and / or uplink.

[0065] In some aspects, the UE 215 may include means for announcing the maximum SRS antenna switching capability to the base station. The UE 215 may also include means for sending the SRS to the base station via the reduced SRS antenna switching capability or the maximum SRS antenna switching capability. Such means may include combining Figure 2 One or more components of UE 215 are described.

[0066] As noted above, Figure 2 This is provided only as an example. Other examples may differ from those described above. Figure 2 Examples described.

[0067] In some aspects, 5G NR SRS antenna switching is specified by the 3GPP standard specifications and deployed by some operators for time division duplex (TDD) bands. In TDD, since the downlink and uplink are on the same frequency channel, there is uplink / downlink channel reciprocity. The UE can have multiple receive antennas. SRS antenna switching allows the UE to select one or more receive antennas to send SRS. SRS is sent from the UE to the base station (e.g., eNB / gNB) on the uplink. SRS can improve downlink precoding for downlink MIMO enhancement.

[0068] The Evolved UMTS (Universal Mobile Telecommunications Service) Terrestrial Radio Access Network (E-UTRAN) New Radio Dual Connectivity (ENDC) operation mode is one of the Multi-Radio Access Technology (RAT) Dual Connectivity (MR-DC) modes defined in the 3GPP standard. In the ENDC mode (e.g., dual connectivity mode), LTE is a primary cell (PCell) (e.g., a primary cell group (MCG)), and NR is a primary secondary cell (PSCell) (e.g., a secondary cell group (SCG)). LTE and NR can have multiple carriers, and therefore, each of LTE and NR can be a different cell group.

[0069] Various configurations can be specified for the ENDC mode. For example, in an NR system (such as an NR below 6 GHz (NRsub6) system), NR SRS antenna switching can be performed across different UE antennas to send SRS on the uplink. Different NR SRS antenna switching configurations can be specified. For example, NR SRS antenna switching can have a single transmit four receive (1T4R) configuration (e.g., selecting a transmit antenna from four receive antennas) or a single transmit two receive configuration (1T2R) (e.g., selecting a transmit antenna from two receive antennas). NR below 6 GHz systems with uplink MIMO can have a two-transmit four-receive (2T4R) configuration for SRS antenna switching. LTE systems can have a 1T4R or 1T2R configuration. In ENDC mode, the radio frequency (RF) front end can share four, five, or six antennas between LTE and NR. Antenna cross switches can be shared between LTE and NR to send SRS.

[0070] The dual-connection LTE+NR system can be configured as an FDD+TDD system, a TDD+TDD system (e.g., synchronous and asynchronous network topologies), an FDD+FDD system, or a TDD+FDD system. SRS antenna switching can be performed in LTE-FDD and NR (FDD+TDD) systems. In this example, for NR, the UE can perform carrier-based SRS antenna switching, where the UE performs downlink / uplink on the FDD PSCell and performs downlink only on the (NR) TDD SCell. Still, the UE can suspend the FDD PSCell downlink / uplink to switch to the TDD SCell to send SRS symbols on the TDD carrier to assist the downlink MIMO precoding of TDD using the SRS sent on the uplink. The FDD PSCell downlink / uplink can be suspended via NR SRS antenna switching.

[0071] In LTE and NR uplink MIMO configurations, NR uplink MIMO is 2x2 (e.g., spatial multiplexing via two uplink antennas), and downlink MIMO is 4x4. For example, NR's uplink / downlink MIMO SRS antenna switching capability can be 2T4R (e.g., LTE 1T4R and NR 2T4R with 2T4R SRS on NR). For LTE carrier aggregation (CA) and NR CA ENDC configurations, LTE1 can be PCell (1T4R), LTE2 can be SCell (1T4R), NR1 can be PSCell (2T4R SRS), and NR2 can be SCell (1T4R SRS). That is, various antenna configurations can be used in different scenarios (e.g., MIMO, CA, etc.).

[0072] SRS can be configured for periodic transmission (e.g., semi-static transmission). Periodic transmission can be configured via RRC signaling. The period for SRS configuration may include: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 640, 1280 or 2560 time slots. Alternatively, SRS can be configured for non-periodic transmission (e.g., dynamic transmission) via a grant (e.g., DCI format 1_1 and DCI format 0_1). Furthermore, SRS can be semi-persistently activated / deactivated via a MAC control element (MAC-CE).

[0073] For each ENDC band combination, the UE may be configured for SRS antenna switching via the supportedSRS-TxPortSwitch field in the 3GPP standard. The supportedSRS-TxPortSwitch field specifies whether the UE is configured for antenna switching and the supported switching types. For example, as specified in 3GPP TS 38.214, V15.5.0, Section 6.2.1.2, the supportedSRS-TxPortSwitch field may be enumerated using {t1r2, t1r4, t2r4, t1r4-t2r4, t1r1, t2r2, t4r4, notSupported}.

[0074] The txSwitchImpactToRx field may indicate a frequency band in the ENDC band combination that may have transmissions affected by SRS antenna switching. The txSwitchImpactToRx field may be set with one or more integer values ​​to identify the frequency band. Additionally, the txSwitchWithAnotherBand field may indicate a frequency band in the ENDC that may be received by SRS antenna switching. The txSwitchWithAnotherBand field may be set with one or more integer values ​​to identify the frequency band.

[0075] In ENDC mode, LTE and NR uplink and downlink transmissions can be synchronous or asynchronous. Synchronous or asynchronous uplink and downlink transmissions can be set in the standard. Table 1 provides an example of the standard part for configuring synchronous or asynchronous uplink and downlink transmissions for LTE and NR. Table 1 is specified in 3GPP TS 38.306 and 38.331.

[0076]

[0077] Since the RF front-end antenna and crossbar switch are shared, NR SRS antenna switching may affect the transmit (Tx) and / or receive (Rx) operations of LTE. LTE transmission may be affected by the interruption caused by NR SRS antenna switching. LTE transmission interruption causes the loss of ENDC uplink transmission at the UE. Therefore, it is desirable to avoid LTE transmission interruption to prevent the loss of uplink transmission.

[0078] In ENDC mode, RRC / non-access stratum (NAS) control signaling can be supported via system resource block (SRB) 1 (SRB1), SRB2, or both on a dedicated control channel (e.g., a logical channel) between the UE and the base station. In addition, in ENDC mode, SRB3 (e.g., SRB3) can be configured to transmit NR RRC messages between the UE and the base station via the NR radio interface (see 3GPP TS 36.331 Section 4.2.2). Still, SRB3 may not be supported on commercial networks. Therefore, for UEs operating in ENDC mode on current commercial networks, the UE can send control signals to the base station via SRB1 / SRB2 on the LTE / MCG link. It is desirable to maintain the reliability of control signal transmission.

[0079] For TDD synchronous LTE and NR dual connectivity configuration (e.g., TDD+TDD), if NR SRS antenna switching causes NR transmission to switch to (e.g., conflict with) the LTE transmit / receive (Tx / Rx) antenna, the LTE transmission may be blanked or interrupted. In TDD+TDD mode, the UE may not support simultaneous LTE transmission / reception (Tx / Rx) concurrent with NR transmission. In this example, LTE reception is implied to be concurrent with NR reception because LTE reception cannot be concurrent with NR transmission. Concurrent LTE reception and NR reception are indicated via UE capability signaling referenced in the UE's RRC signaling to the base station (e.g., eNB, gNB).

[0080] For FDD+TDD LTE and NR dual connectivity configurations, if NR SRS antenna switching causes NR transmission to switch to the LTE transmit / receive (Tx / Rx) antenna, both LTE transmit and receive may be blanked or interrupted. In LTE FDD, both LTE transmit and receive can operate in full-duplex mode.

[0081] In some aspects, the UE may be configured to prioritize one network connection over another network connection based on one or more characteristics associated with the UE, characteristics associated with the network, characteristics associated with communications performed on the corresponding network connection, or any combination thereof. For example, when a high priority call (e.g., critical business) such as an emergency 911 call, a voice call, or a video phone call is performed on a first network connection (e.g., an LTE network connection), the first network connection may be prioritized over a second network connection (e.g., an NR network connection) to reduce or prevent interruption of the high priority call. Similarly, if a higher priority call is being performed on the first NR network connection, the first NR network connection may be prioritized over the second NR network connection to reduce or prevent interruption of the high priority call.

[0082] In some aspects, LTE ACK / NACK bundling for LTE TDD HARQ feedback may generate a single ACK / NACK report based on ACK / NACK for assigned subframes within a set of associated subframes. Therefore, interruption of LTE bundled ACK / NACK report transmission may affect LTE performance and / or reliability.

[0083] In some cases, the UE selects a Tx antenna via a Tx ASDIV function. Specifically, Tx ASDIV can be configured to select the best Tx antenna. For example, when a user holds the UE, the Tx ASDIV function can select a Tx antenna that is not blocked by the user's hand. In some aspects, in dual connectivity mode (e.g., ENDC mode), if LTE and NR share an antenna and an antenna cross switch, LTE can be prioritized to select a Tx antenna via the UE's Tx ASDIV function. Different LTE ASDIV configurations may affect LTE Tx / Rx interruption due to NR SRS antenna switching.

[0084] On the other hand, reducing the number of antennas used for NR SRS switching may affect NR downlink performance due to the inability to perform detection on all possible NR Rx antenna ports. For example, if the UE's NR SRS capability is 1T4R, downgrading to 1T2R may reduce the NR downlink throughput because the base station may only receive detection information on two antennas instead of four antennas. That is, although the UE is able to send SRS from one of the four antennas, the UE may only send SRS on one of the two antennas. Signaling the downgrade of the UE's SRS UE capability specifies that the UE declares a radio link failure and performs an attach / detach procedure to provide updated radio capabilities. Therefore, signaling the downgrade may be time consuming and may degrade performance.

[0085] Various aspects of the present disclosure relate to reporting (e.g., announcing) the maximum NR SRS antenna switching capability while dynamically adjusting the NR SRS antenna switching capability. In some aspects, the maximum NR SRS antenna switching capability is the antenna switching configuration of the UE for SRS antenna switching (mTnR, where m, n indicates the number of transmit and receive antennas). In some aspects, the maximum NRSRS antenna switching capability may refer to the antenna switching configuration with which the UE is configured (when performing NR SRS antenna switching). In other aspects, the maximum NR SRS antenna switching capability may refer to the maximum antenna switching configuration with which the UE can be configured. In one configuration, if the NR SRS antenna switching interrupts LTE Tx based on a prioritization strategy (e.g., a predefined prioritization strategy), the NR SRS antenna switching is performed with reduced capability. That is, if the NR SRS antenna switching causes certain LTE Tx interruptions (e.g., temporary loss of LTE Tx signals), the NR SRS antenna switching capability may be reduced. In some cases, the reduced capability may not be notified to the base station. Various aspects of the present disclosure are discussed with respect to RF front-end designs involving RF front-ends or antennas shared between LTE and NR in dual connectivity mode (e.g., ENDC).

[0086] Additional aspects of the present disclosure relate to prioritizing LTE Tx antennas or prioritizing NRSRS antenna switching capabilities based on prioritization criteria. Prioritizing LTE Tx antennas may allow the UE to select a preferred Tx antenna at the expense of reducing NR SRS antenna switching capabilities. For example, if LTE Tx is prioritized, the LTE Tx antenna will not be interrupted due to NR SRS antenna switching. In this example, the maximum NR SRS antenna switching capability may be 1T4R. The NR SRS antenna may be masked to prevent conflicts with the LTE Tx antenna, thereby avoiding LTE Tx interruption / blanking. Masking one or more NR SRS antennas may reduce effective NRSRS antenna switching to 1T3R, 1T2R, or 1T1R.

[0087] As discussed, the supportedSRS-TxPortSwitch field may be enumerated with {t1r2, t1r4, t2r4, t1r4-t2r4, t1r1, t2r2, t4r4, notSupported}. In some cases, t1r3 is not enumerated in the supportedSRS-TxPortSwitch field. Still, from the UE's point of view, if the UE signals T1R4 to the network via an RRC signaling process, the UE may use a less capable NR SRS antenna switching configuration such as T1R3, T1R2, or T1R1. The configuration may depend on the Tx antenna ASDIV antenna switching functionality used for the LTE Tx antenna. That is, when reducing the capability of the NR SRS antenna switching configuration, the UE may select a configuration that is not enumerated in the supportedSRS-TxPortSwitch field (e.g., T1R3). In addition, the UE may select the reduced configuration without notifying the base station (e.g., the UE may autonomously select the reduced configuration).

[0088] Prioritized NR SRS antenna switching capability allows NR SRS antenna switching to be performed at maximum capacity. For example, with 1T4R NR SRS antenna switching capability, NR SRS can switch between four antennas even if LTE Tx is blanked due to shared crossbar switch / antenna.

[0089] In some aspects, the prioritization between LTE and NR can be semi-statically determined based on the call type. For example, if the call type is a high priority call type (such as an IP Multimedia System (IMS) call (e.g., a voice call, a video phone call), an emergency call, an E-911 type call, or other high priority call type), LTE can be prioritized. In some aspects, when LTE is prioritized, LTE Tx may not be interrupted. In addition, when LTE is prioritized, the NR SRS antenna switching capability may be reduced to less than the maximum capability. For example, the 1T4R capability may be reduced to 1T3R or 1T2R. When this call type is initiated, this prioritization protects the data and control signaling sent on the LTE uplink. Otherwise, the NR SRS antenna switching may be prioritized to utilize the maximum capability. For example, if the NR SRS antenna switching maximum capability is 1T4R, the NR SRS can send SRS from all four antennas.

[0090] Example pseudo code for prioritizing LTE based on high priority call type is as follows:

[0091] If LTE CALL_TYPE == {IMS, Emergency, E-911, VoLTE},

[0092] Prioritizing LTE uplink

[0093] Set NR SRS antenna switching to reduced capability (e.g. 1T4R->1T3R)

[0094] otherwise

[0095] Set NR SRS antenna switching to maximum capability (e.g., 1T4R)

[0096] Finish

[0097] VoLTE indicates Voice over LTE.

[0098] In one configuration, the UE dynamically performs NR SRS antenna switching with reduced capability based on the ASDIV configuration of LTE and / or the timing of LTE's Tx relative to the timing of NR SRS antenna switching. If a conflict is detected between the LTE Tx antenna and the NR SRS Tx antenna, the UE can detect (e.g., transmit) NR SRS on a non-conflicting antenna. That is, the NR SRS antenna switching capability can be reduced to avoid the conflict. For example, when the UE detects a conflict between a transmission from the NR target SRS antenna and a transmission from the target antenna of LTE, the NR SRS antenna switching capability can be dynamically reduced from 1T4R to 1T3R. The conflict can be determined based on the RF antenna cross switch and the antenna sharing topology.

[0099] In one configuration, NRSRS antenna switching capability reduction may be performed in a semi-static manner based on the ASDIV functionality of LTE (eg, ASDIV configuration). Figure 3 and Figure 4A-4E As shown, for one or more antennas selected as LTE Tx antennas by the ASDIV function (e.g., ASDIV configuration), NR SRS antenna switching is blocked. In some aspects, the UE's NR L1 / MAC can perform NR SRS antenna switching with reduced capability (e.g., 1TXR instead of 1T4R, where X<4). Additionally or alternatively, the NR SRS antenna switching capability reduction can be dynamically performed based on LTE's Tx antenna selection (e.g., ASDIV configuration) and / or LTE's Tx subframe time opportunity (for LTE TDD).

[0100] like Figure 3 As shown, the UE may be configured with four antennas (eg, Ant 0–Ant 3). Figure 3 In the example shown in FIG. 1 , LTE is operating on Band 3 (B3) and NR is operating on Band 41 (N41). Figure 3As shown, for ASDIV configuration 0, LTE transmit (B3 Tx) is designated for antenna 0 (ANT 0). Additionally, LTE can receive on antennas zero through three (B3 Rx0–B3 Rx3).

[0101] In addition, for Figure 3 In the example of FIG. 1 , NR control information (e.g., PUCCH) is sent (N41 Tx) on antenna three. SRS may be sent on the last symbol set (e.g., the last six symbols) of the time slot. Based on the specified mode, the UE may send SRS via any one of antennas zero to three. The NR SRS Tx antenna may be selected by switching one or more gates 300-a to 300-f of a crossbar switch (XSW) box. Figure 3 As shown, the crossbar switch boxes (eg, XSW 1 and XSW 2) are cascaded. For example, if the SRS is transmitted in a periodic manner, the SRS is transmitted from each antenna, one at a time per transmission period.

[0102] In the current example, when SRS is transmitted via antenna zero, LTE Tx may be temporarily disconnected. That is, LTE B3 Tx or Rx0 on antenna zero may be affected. In addition, by switching from the first gate 300-a to the third gate 300-c, LTE Rx2 may be affected. Still, LTE Tx via antenna zero is selected based on the ASDIV configuration. Therefore, LTE Tx may take precedence over NR SRS Tx from antenna zero. As such, NR SRS may be reduced to being transmitted only via antennas one to three.

[0103] Figure 4A An example of blocking NR SRSTx from antenna zero when the ASDIV configuration specifies LTE Tx via antenna zero is shown. In one configuration, the UE is aware of the ASDIV configuration before selecting antenna zero for NR SRS transmission. Therefore, when antenna zero is designated for LTE Tx, the UE does not transmit NR SRS from antenna zero.

[0104] Figure 4B Another example of blocking NR SRSTx from antenna zero when the ASDIV configuration specifies LTE Tx via antenna zero is shown. For reduced capability, NR SRS may be transmitted only from antennas one to three. For maximum capability, NR SRS may be transmitted from antennas zero to three.

[0105] Figure 4C An example of blocking NR SRSTx from antenna two when the ASDIV configuration specifies LTE Tx via antenna two is shown. For reduced capability, NR SRS may be transmitted only from antennas zero, one, and three. For maximum capability, NR SRS may be transmitted from antennas zero to three.

[0106] Figure 4D An example of blocking NR SRSTx from antenna three when the ASDIV configuration specifies LTE Tx via antenna three is shown. For reduced capability, NR SRS may be sent only from antennas zero to two. For maximum capability, NR SRS may be sent from antennas zero to three.

[0107] Figure 4E An example is shown where NR SRS Tx from antenna one is blocked when the ASDIV configuration specifies LTE Tx via antenna one. For reduced capability, NR SRS may be transmitted only from antennas zero, two, and three. For maximum capability, NR SRS may be transmitted from antennas zero to three.

[0108] In another aspect, NR SRS antenna switching capability reduction can be dynamically performed based on LTE's Tx antenna selection (e.g., ASDIV configuration) and / or LTE's Tx active time opportunities (for LTE FDD). The active time opportunities can be based on known Tx opportunities. The Tx opportunities can be determined based on the periodic type of activity (such as LTE voice (VoLTE)), where the pre-known LTE Tx subframes are used for LTE VoLTE transmission, and timing information can be provided to the UE's NR SRS controller in the modem (e.g., reference to the start / end time of a common known timing source provided by the LTE controller to the NR L1 controller). In some aspects, the UE can prioritize a first or second network connection over another based on a timing conflict between a set of transmission opportunities associated with calls performed on the corresponding network connections. In particular, conflicts between calls with known transmission opportunities can be used to prioritize one network connection over another. For example, the UE can prioritize a first network connection over a second network connection based on a timing conflict between a first set of transmission opportunities associated with a first call performed on a first network connection and a second set of transmission opportunities associated with a second call performed on a second network connection. Calls performed over the corresponding network connections may include any calls known in the art, including but not limited to E-911 calls, IMS calls, VoIP calls, VoLTE calls, video phone calls, etc.

[0109] As another example, the active time opportunities may include known LTE on / off timings, such as LTE connected mode discontinuous reception (CDRX)-on / off cycles. Such periodicity and timing information may be provided to the UE's NR SRS controller (e.g., with reference to LTE's CDRX on / off duration and period of a common known timing source provided from LTE to the NR software module). In some aspects, the UE may be configured to prioritize one network connection over another network connection based on a timing conflict between DRX processes (e.g., CDRX processes) associated with the respective network connections. For example, the UE may prioritize a first network connection over a second network connection based at least in part on a first DRX process associated with the first network connection and a second DRX process associated with the second network connection. Specifically, the UE may prioritize the first network connection over the second network connection based at least in part on a timing conflict between a first on duration of the first DRX process and a second on duration of the second DRX process.

[0110] Figure 5 An example of LTE TDD config-2 DL / UL configuration with NR mode 1 is shown. Figure 5 As shown, the subframe pattern 500 for LTE config-2 includes six downlink subframes (e.g., D0, D3, D4, D5, D8, D9), two special subframes (e.g., S1, S6) and two uplink subframes (e.g., U2, U7). Figure 5 Also shown is a subframe configuration for NR mode 1 502. A 3 ms delay or a 2 ms subframe offset can synchronize the LTE TDD subframe pattern 500 and the NR subframe pattern 1 502, so that Tx / Rx is synchronized between LTE and NR.

[0111] exist Figure 5 In the example of , NR SRS 504 is transmitted in an NR uplink subframe (SF) 506 that overlaps with an LTE uplink subframe 508. According to aspects of the present disclosure, when SRS Tx from the NR uplink SF 506 overlaps with LTE TX from the uplink SF 508, the UE will determine whether to operate the NR SRS antenna switching at maximum capability or at reduced capability. Figure 5 In the example shown in FIG. 4 , NR SRS antenna switching occurs with a period of 20 ms.

[0112] In various aspects of the present disclosure, the UE dynamically adjusts the NR SRS antenna switching capability based on the uplink activity of LTE. For example, if the uplink activity of LTE is greater than the uplink activity threshold for a period of time, LTE can be prioritized and the NR SRS antenna switching capability can be reduced to avoid LTE Tx blanking. In some aspects, the uplink activity of LTE can be determined based on the uplink subframe activity of the physical uplink shared channel (PUSCH) or the physical uplink control channel (PUCCH). For example, if one uplink subframe in ten uplink subframes in a radio frame is associated with PUCCH / PUSCH, the uplink activity can be determined as 10% (e.g., 10% uplink activity). The uplink activity can be observed over a period of time (such as 500ms or 1 second). In some aspects, the average uplink activity can be determined and compared with the uplink activity threshold. For example, if the threshold is 20% and the observed LTE uplink activity is 30% (e.g., the average uplink activity is greater than the uplink activity threshold), the LTE uplink can be prioritized and the NR SRS can be specified to operate at a reduced capacity. In some cases, the uplink activity threshold can be differentiated for cases where LTE TDD ACK / NACK bundling is supported in the network and for cases where LTE TDD ACK / NACK bundling is not supported. For example, when ACK / NACK bundling is supported, a more conservative threshold (e.g., 10%) can be specified, and when ACK / NACK bundling is not supported, a less conservative threshold (e.g., 25%) can be specified.

[0113] By specifying the uplink activity threshold, the UE can detect when there is sufficient uplink LTE traffic, thereby ensuring that LTE uplink interruptions due to NR SRS antenna switching are avoided.

[0114] Example pseudo code for prioritizing LTE based on uplink activity threshold is as follows:

[0115] If LTE UL_Activity>threshold,

[0116] Prioritizing LTE uplink

[0117] Set NR SRS antenna switching to reduced capability (e.g. 1T4R->1T3R)

[0118] otherwise

[0119] Set NR SRS antenna switching to maximum capability (e.g., 1T4R)

[0120] Finish

[0121] In one configuration, the UE dynamically adjusts the NR SRS antenna switching capability based on the PDCCH grant rate of LTE. For example, if the LTE PDCCH downlink grant rate exceeds the downlink grant rate threshold (e.g., PDCCH downlink grant rate>downlink grant rate threshold), the NR SRS antenna switching capability is reduced. Otherwise, the NR SRS antenna switching operates at maximum capability. Additionally or alternatively, if the LTE PDCCH uplink grant rate exceeds the uplink grant rate threshold (e.g., PDCCH uplink grant rate>uplink grant rate threshold), the NR SRS antenna switching capability is reduced. Otherwise, the NR SRS antenna switching operates at maximum capability. The downlink grant rate threshold may be the same as or different from the uplink grant rate threshold.

[0122] In one configuration, when LTE traffic exceeds a threshold, NR SRS operates at a reduced capacity. NR SRS operates at a reduced capacity until LTE traffic is less than the threshold. This process considers certain network policies as follows: If the device supports NR, data traffic is transferred to NR RAT while reserving LTE network capabilities for legacy devices that do not support NR RAT.

[0123] Example pseudo code for prioritizing LTE based on its PDCCH grant rate may be as follows:

[0124] If LTE PDCCH_DL_GrantRate>Threshold1,

[0125] Prioritizing LTE uplink

[0126] Set NR SRS antenna switching to reduced capability (e.g. 1T4R->1T3R)

[0127] Otherwise if LTE PDCCH_UL_GrantRate>Threshold2,

[0128] Prioritizing LTE uplink

[0129] Set NR SRS antenna switching to reduced capability (e.g. 1T4R->1T3R)

[0130] otherwise

[0131] Set NR SRS antenna switching to maximum capability (e.g., 1T4R)

[0132] Finish

[0133] In one configuration, the UE dynamically adjusts the NR SRS antenna switching capability based on the LTE PDCCH grant rate and SNR and / or uplink PHR. For example, if the LTE PDCCH downlink grant rate exceeds the downlink grant rate threshold (e.g., PDCCH downlink grant rate > downlink grant rate threshold) and the LTE SNR is less than the SNR threshold (e.g., SNR < SNR threshold), then the NR SRS antenna switching capability can be reduced. Otherwise, the NR SRS antenna switching can operate at maximum capability. Additionally or alternatively, if the LTE PDCCH uplink grant rate exceeds the uplink grant rate threshold (e.g., PDCCH uplink grant rate > uplink grant rate threshold) and the LTE PHR is less than the PHR threshold (e.g., PHR < PHR threshold), then the NR SRS antenna switching capability can be reduced. Otherwise, the NR SRS antenna switching can operate at maximum capability. The downlink grant rate threshold, uplink grant rate threshold, SNR threshold, and PHR threshold can be the same as or different from each other.

[0134] As discussed, if the LTE downlink grant rate is high (e.g., greater than the downlink grant rate threshold) and the LTE SNR is low (e.g., less than the SNR threshold), then the NR SRS antenna switching capability can be reduced. Additionally, when the LTE uplink grant rate is high (e.g., greater than the uplink grant rate threshold) and the LTE PHR is low (e.g., less than the PHR threshold), the NR SRS antenna switching capability can be reduced.

[0135] Exemplary pseudocode for prioritizing LTE based on one of the LTE PDCCH grant rate and SNR or PHR can be as follows:

[0136] If (LTE PDCCH_DL_GrantRate > Threshold1) && (LTE_SNR < Threshold3),

[0137] Prioritize the LTE uplink

[0138] Set the NR SRS antenna switching to reduced capability (e.g., 1T4R -> 1T3R)

[0139] Else if (LTE PDCCH_UL_GrantRate > Threshold2) && (LTE_PHR < Threshold4),

[0140] Prioritize the LTE uplink

[0141] Set the NR SRS antenna switching to reduced capability (e.g., 1T4R -> 1T3R)

[0142] otherwise

[0143] Set NR SRS antenna switching to maximum capability (e.g., 1T4R)

[0144] Finish

[0145] In one configuration, the UE dynamically adjusts the NR SRS antenna switching capability based on the count of random access channel (RACH) Msg-1 failure, RACH Msg-3 failure, and / or scheduling request (SR) failure of LTE. For example, if the RACH Msg-1 failure is greater than a first threshold, the RACH Msg-3 failure is greater than a second threshold, the SR failure is greater than a third threshold, or any combination thereof, the NR SRS antenna switching capability is reduced. Otherwise, the NR SRS antenna switching operates at maximum capability. The threshold may be a failure count value. The first, second, and third thresholds may be the same or different from each other.

[0146] High priority messages (such as RACH messages and scheduling requests) specify a reliable uplink channel. Failure to send one or more of these messages may result in a radio link failure. For dual connectivity mode (e.g., ENDC), a radio link failure results in both LTE and NR radio link failures. Therefore, it is desirable to reduce the NR SRS antenna switching capability to provide a reliable uplink channel for high priority messages.

[0147] An exemplary pseudo code for prioritizing LTE based on RACH procedure and scheduling request may be as follows:

[0148] If (RACH Msg_1_fail_count>Threshold1) or (RACH Msg_3_fail_count>Threshold2) or (SR_fail_count>Threshold3),

[0149] Prioritizing LTE uplink

[0150] Set NR SRS antenna switching to reduced capability (e.g. 1T4R->1T3R)

[0151] otherwise

[0152] Set NR SRS antenna switching to maximum capability (e.g., 1T4R)

[0153] Finish

[0154] As noted above, Figure 3-Figure 5 This is provided only as an example. Other examples may differ from those described above. Figure 3-Figure 5 Examples described.

[0155] Figure 6 A block diagram 600 of a device 605 supporting a method for managing 5G NR SRS antenna switching concurrency in an ENDC according to aspects of the present disclosure is shown. The device 605 may be an example of aspects of a UE 115 as described herein. The device 605 may include a receiver 610, a communication manager 615, and a transmitter 620. The device 605 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0156] The receiver 610 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to supporting methods for managing 5G NR SRS antenna switching concurrency in ENDC, etc.). The information may be passed to other components of the device 605. The receiver 610 may be a reference Fig. 9 Examples of various aspects of the transceiver 920 are described. The receiver 610 may utilize a single antenna or a group of antennas.

[0157] The communication manager 615 may report the maximum SRS antenna switching capability to the base station and transmit the SRS to the base station via the reduced SRS antenna switching capability. The communication manager 615 may be an example of aspects of the communication manager 910 described herein.

[0158] The communication manager 615 or its subcomponents may be implemented in hardware, in code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 615 or its subcomponents may be performed by a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

[0159] The communication manager 615 or its subcomponents may be physically located at various locations, including being distributed so that portions of the functions are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 615 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 615 or its subcomponents may be combined with one or more other hardware components (including, but not limited to, input / output (I / O) components, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof).

[0160] The transmitter 620 can transmit signals generated by other components of the device 605. In some examples, the transmitter 620 can be co-located with the receiver 610 in a transceiver module. For example, the transmitter 620 can be a reference Fig. 9 Examples of aspects of the transceiver 920 are described. The transmitter 620 may utilize a single antenna or a group of antennas.

[0161] Figure 7 A block diagram 700 of a device 705 supporting a method for managing 5G NR SRS antenna switching concurrency in an ENDC according to aspects of the present disclosure is shown. The device 705 may be an example of aspects of a device 705 or UE 115 as described herein. The device 705 may include a receiver 710, a communication manager 715, and a transmitter 730. The device 705 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0162] The receiver 710 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to methods supporting management of 5G NR SRS antenna switching concurrency in ENDC, etc.). The information may be passed to other components of the device 705. The receiver 710 may be a reference Fig. 9 Examples of various aspects of the transceiver 920 are described. The receiver 710 may utilize a single antenna or a group of antennas.

[0163] The communication manager 715 may be an example of aspects of the communication manager 615 as described herein. The communication manager 715 may include a UE capability report manager 720 and an SRS transmission manager 725. The communication manager 715 may be an example of aspects of the communication manager 910 as described herein.

[0164] The UE capability reporting manager 720 may report the maximum SRS antenna switching capability to the base station.

[0165] The SRS transmission manager 725 may transmit the SRS to the base station via the reduced SRS antenna switching capability.

[0166] The transmitter 730 can transmit signals generated by other components of the device 705. In some examples, the transmitter 730 can be co-located with the receiver 710 in a transceiver module. For example, the transmitter 730 can be a reference Fig. 9 Examples of various aspects of the transceiver 920 are described. The transmitter 730 may utilize a single antenna or a group of antennas.

[0167] Figure 8A block diagram 800 of a communication manager 805 supporting a method for managing 5G NR SRS antenna switching concurrency in an ENDC according to aspects of the present disclosure is shown. The communication manager 805 may be an example of aspects of the communication manager 615, the communication manager 715, or the communication manager 910 described herein. The communication manager 805 may include a UE capability report manager 810, an SRS transmission manager 815, and a prioritization manager 820. Each of these modules may communicate with each other directly or indirectly (e.g., via one or more buses).

[0168] The UE capability reporting manager 810 may report the maximum SRS antenna switching capability to the base station.

[0169] The SRS transmission manager 815 may transmit the SRS to the base station via a reduced SRS antenna switching capability. In some examples, when the first network connection takes precedence over the second network connection, the SRS transmission manager 815 may transmit the SRS via a reduced SRS antenna switching capability. In some examples, when the second network connection takes precedence over the first network connection, the SRS transmission manager 815 may transmit at least one additional SRS via a maximum SRS antenna switching capability. In some examples, reducing the SRS antenna switching capability includes masking at least one NR SRS antenna.

[0170] The prioritization manager 820 may prioritize the first network connection over the second network connection when the first network connection includes a high priority call type or when the uplink activity of the first network connection is greater than a threshold.

[0171] In some examples, the prioritization manager 820 may prioritize the first network connection over the second network connection when a control channel downlink grant rate for the first network connection is greater than a first threshold, or when a control channel uplink grant rate for the first network connection is greater than a second threshold.

[0172] In some examples, the prioritization manager 820 may prioritize the first network connection over the second network connection when the control channel downlink grant rate for the first network connection is greater than a first threshold and the signal-to-noise ratio of the first network connection is less than a third threshold, or when the control channel uplink grant rate for the first network connection is greater than a second threshold and the power headroom of the first network connection is less than a fourth threshold.

[0173] In some examples, the prioritization manager 820 may prioritize the first network connection over the second network connection when a random access message one failure count of the first network connection is greater than a first threshold, when a random access message three failure count of the first network connection is greater than a second threshold, or when a scheduling request failure count of the first network connection is greater than a third threshold.

[0174] In some examples, prioritization manager 820 may prioritize the first network connection over the second network connection based on a transmit antenna selected for the first network connection by a transmit antenna switching diversity feature, a timing conflict between the first network connection and the second network connection, or a combination thereof.

[0175] In some examples, prioritization manager 820 may semi-statically prioritize the first network connection over the second network connection based on the transmit antenna selected by the transmit antenna switching diversity feature.

[0176] In some examples, the priority manager 820 can dynamically prioritize the first network connection over the second network connection based on the transmit antenna selected by the transmit antenna switching diversity feature, and one of the subframe timing of the first network connection or the activity timing of the first network connection. The activity timing can be associated with the FDD communication for the first network connection. For example, the activity timing can be based on a known set of transmission opportunities for periodic communication (e.g., VoLTE), in which there are known Tx subframes for transmission. In such a case, the activity timing information (e.g., the start / end time of the transmission with reference to a common known timing source) can be provided to the SRS controller of the UE. In addition or alternatively, the activity timing can be based on a known on / off timing for communication performed on the first network connection (e.g., an LTECDRS on / off cycle configured for an LTE CDRX mode). In such a case, the period and timing information (e.g., the activity timing) can be provided to the SRS controller of the UE (e.g., the CDRX on / off duration and period for LTE communication can be referenced to the common known timing).

[0177] In some examples, when the first network connection includes critical services or critical control signaling, the first network connection is prioritized over the second network connection. In some aspects, the terms "critical services" or "critical control signaling" may refer to the relative priority of services and control signaling, and may be based on the type of services / control signaling. For example, emergency calls (e.g., E911 type calls), IMS type calls (e.g., voice calls, video phone calls) may have a higher priority than other types of calls and may be referred to as critical services.

[0178] In some cases, the first network connection includes an LTE connection and the second network connection includes a 5G NR connection. In other cases, the first network connection includes a first 5G NR connection and the second network connection includes a second 5G NR connection.

[0179] Fig. 9A diagram of a system 900 including a device 905 supporting a method for managing 5G NR SRS antenna switching concurrency in an ENDC according to aspects of the present disclosure is shown. The device 905 may be an example of a device 605, a device 705, or a UE 115 as described herein or include a component of the device 605, the device 705, or the UE 115. The device 905 may include components for two-way voice and data communications, including components for sending and receiving communications, including a communication manager 910, an I / O controller 915, a transceiver 920, an antenna 925, a memory 930, and a processor 940. These components may communicate electronically via one or more buses (e.g., a bus 945).

[0180] The communication manager 910 may report the maximum SRS antenna switching capability to the base station, and transmit the SRS to the base station via the reduced SRS antenna switching capability.

[0181] I / O controller 915 can manage input and output signals for device 905. I / O controller 915 can also manage peripheral devices that are not integrated into device 905. In some cases, I / O controller 915 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 915 can utilize a computer such as a , or another known operating system. In other cases, I / O controller 915 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 915 may be implemented as part of a processor. In some cases, a user may interact with device 905 via I / O controller 915 or via hardware components controlled by I / O controller 915.

[0182] The transceiver 920 may communicate bidirectionally via one or more antennas, wired or wireless links as described above. For example, the transceiver 920 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 920 may also include a modem for modulating packets and providing the modulated packets to an antenna for transmission, and demodulating packets received from an antenna.

[0183] In some cases, a wireless device may include a single antenna 925. However, in some cases, the device may have more than one antenna 925 that are capable of sending or receiving multiple wireless transmissions simultaneously.

[0184] The memory 930 may include random access memory (RAM) and read-only memory (ROM). The memory 930 may store computer-readable, computer-executable code 935, which includes instructions that, when executed, cause the processor to perform various functions described herein. In some cases, the memory 930 may also contain, among other things, a basic I / O system (BIOS), which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0185] The processor 940 may include an intelligent hardware device (e.g., a general purpose processor, a DSP, a central processing unit (CPU), a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor 940 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 940. The processor 940 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 930) to cause the device 905 to perform various functions (e.g., functions or tasks supporting a method for managing 5G NR SRS antenna switching concurrency in an ENDC).

[0186] The code 935 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 935 may be stored in a non-transitory computer-readable medium (e.g., system memory or other types of memory). In some cases, the code 935 may not be directly executable by the processor 940, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0187] Fig.10 A flow chart illustrating a method 1000 for supporting a method for managing 5G NR SRS antenna switching concurrency in an ENDC according to aspects of the present disclosure is shown. The operations of the method 1000 may be implemented by a UE 115 or a component thereof as described herein. For example, the operations of the method 1000 may be implemented by a UE 115 or a component thereof as described with reference to Figures 6 to 9 In some examples, the UE may execute an instruction set to control the functional units of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described below.

[0188] In some aspects, Fig.10 1 is a diagram illustrating an example process 1000 performed, for example, by a UE, according to various aspects of the present disclosure. The operations of the method may be performed as described herein with reference to Figure 2The example process 1000 is an example of adjusting NR SRS antenna switching capability.

[0189] At 1005, the UE may report (e.g., announce) a first SRS antenna switching capability (e.g., a maximum SRS antenna switching capability) to the base station. In one aspect, the UE announces the maximum SRS antenna switching capability via the supportedSRS-TxPortSwitch field. The operations of 1005 may be performed according to the methods described herein. In some examples, aspects of the operations of 1005 may be as described with reference to Figures 6 to 9 The UE capability reporting manager described in this document is used to perform the above operations.

[0190] At 1010, when the first network connection takes precedence over the second network connection, the UE may send an SRS to the base station via a second SRS antenna switching capability, wherein the second SRS antenna switching capability is reduced relative to the first SRS antenna switching capability. The UE may send the SRS to the base station via a reduced SRS antenna switching capability or a maximum SRS antenna switching capability. When the first network connection takes precedence over the second network connection, the SRS may be sent via a reduced SRS antenna switching capability, or when the second network connection takes precedence over the first network connection, the SRS may be sent via a maximum SRS antenna switching capability. The operations of 1010 may be performed according to the methods described herein. In some examples, aspects of the operations of 1010 may be performed as described with reference to Figures 6 to 9 The SRS transmission manager described in the specification is executed.

[0191] In one configuration, the first network connection is prioritized over the second network connection based on a prioritization criterion. The prioritization criterion may include call type, downlink throughput, uplink throughput, message failure rate, and / or other criteria. In one configuration, the first network connection is prioritized over the second network connection based on a transmit antenna selected for the first network connection by a transmit antenna switching diversity feature and / or a timing conflict between the first network connection and the second network connection.

[0192] If targeted Figure 3 As discussed, a transmit antenna switching diversity feature (ASDIV) may affect receive antennas. That is, multiple receive antennas may be interrupted (e.g., affected) due to SRS antenna switching performed in response to transmit antennas selected by the ASDIV feature and antenna crossbar hardware configuration. For example, due to the Tx ASDIV feature, a 3x3 crossbar has a different effect on receive antenna remapping than a 4x4 crossbar remapping.

[0193] Fig.11 A flow chart illustrating a method 1100 for supporting a method for managing 5G NR SRS antenna switching concurrency in an ENDC according to aspects of the present disclosure is shown. The operations of the method 1100 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 1100 may be implemented by a UE 115 or components thereof as described with reference to Figures 6 to 9 In some examples, the UE may execute an instruction set to control the functional units of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described below.

[0194] At 1105, the UE may report the first SRS antenna switching capability (eg, the maximum antenna switching capability) to the base station. The operations of 1105 may be performed according to the methods described herein. In some examples, aspects of the operations of 1105 may be described with reference to Figures 6 to 9 The UE capability reporting manager described in this document is used to perform the above operations.

[0195] At 1110, when the first network connection is prioritized over the second network connection, the UE may transmit the SRS via a second SRS antenna switching capability, wherein the second SRS antenna switching capability is reduced relative to the first SRS antenna switching capability. The operations of 1110 may be performed according to the methods described herein. In some examples, aspects of the operations of 1110 may be performed as described with reference to Figures 6 to 9 The SRS transmission manager described in the specification is executed.

[0196] At 1115, when the second network connection takes precedence over the first network connection, the UE may transmit at least one additional SRS via the first SRS antenna switching capability. The operations of 1115 may be performed according to the methods described herein. In some examples, aspects of the operations of 1115 may be as described with reference to Figures 6 to 9 The SRS transmission manager described in the specification is executed.

[0197] Fig.12 A flow chart illustrating a method 1200 for supporting a method for managing 5G NR SRS antenna switching concurrency in an ENDC according to aspects of the present disclosure is shown. The operations of the method 1200 may be implemented by a UE 115 or a component thereof as described herein. For example, the operations of the method 1200 may be implemented by a UE 115 or a component thereof as described with reference to Figures 6 to 9 In some examples, the UE may execute an instruction set to control the functional units of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described below.

[0198] At 1205, the UE may report the first SRS antenna switching capability (eg, the maximum SRS antenna switching capability) to the base station. The operations of 1205 may be performed according to the methods described herein. In some examples, aspects of the operations of 1205 may be described with reference to Figures 6 to 9 The UE capability reporting manager described in this document is used to perform the above operations.

[0199] At 1210, when the first network connection includes a high priority call type, or when the uplink activity of the first network connection is greater than a threshold, the UE may prioritize the first network connection over the second network connection. The operations of 1210 may be performed according to the methods described herein. In some examples, aspects of the operations of 1210 may be described as described with reference to Figures 6 to 9 The prioritization manager described is used to perform the

[0200] At 1215, when the first network connection is prioritized over the second network connection, the UE may transmit the SRS via the second SRS antenna switching capability. The operations of 1215 may be performed according to the methods described herein. In some examples, aspects of the operations of 1215 may be as described with reference to Figures 6 to 9 The SRS transmission manager described in the specification is executed.

[0201] At 1220, when the second network connection takes precedence over the first network connection, the UE may transmit at least one additional SRS via the first SRS antenna switching capability. The operations of 1220 may be performed according to the methods described herein. In some examples, aspects of the operations of 1220 may be as described with reference to Figures 6 to 9 The SRS transmission manager described in the specification is executed.

[0202] It should be noted that the methods described herein describe possible implementations, and that the operations and steps may be rearranged or otherwise modified, and other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0203] The following provides a summary of various aspects of the disclosure:

[0204] Aspect 1: A method for wireless communication at a UE, the UE having one or more antennas shared between a first network connection and a second network connection in a dual connection mode, the method comprising: reporting a first SRS antenna switching capability to a base station; and when the first network connection takes precedence over the second network connection, sending an SRS to the base station via a second SRS antenna switching capability, wherein the second SRS antenna switching capability is reduced relative to the first SRS antenna switching capability.

[0205] Aspect 2: The method according to aspect 1 further comprises: when the second network connection takes precedence over the first network connection, sending the SRS via the first SRS antenna switching capability.

[0206] Aspect 3: The method according to any one of Aspects 1 to 2 further includes: when the first network connection includes a high priority call type, or when the uplink activity of the first network connection is greater than a threshold, giving priority to the first network connection over the second network connection.

[0207] Aspect 4: A method according to Aspect 3, wherein the high priority call type includes an E-911 call, an Internet Protocol (IP) Multimedia System (IMS) call, an Internet Protocol Voice (VoIP) call, a Long Term Evolution Voice (VoLTE) call, a 5G NR Voice (VoNR) call, a video phone call, or any combination thereof.

[0208] Aspect 5: The method according to any one of Aspects 1 to 4 further includes: when a control channel downlink grant rate of the first network connection is greater than a first threshold, or when a control channel uplink grant rate of the first network connection is greater than a second threshold, giving priority to the first network connection over the second network connection.

[0209] Aspect 6: The method according to any one of Aspects 1 to 5 also includes: when the control channel downlink grant rate of the first network connection is greater than a first threshold and the signal-to-noise ratio (SNR) of the first network connection is less than a third threshold, or when the control channel uplink grant rate of the first network connection is greater than a second threshold and the power headroom (PHR) of the first network connection is less than a fourth threshold, giving priority to the first network connection over the second network connection.

[0210] Aspect 7: The method according to any one of Aspects 1 to 6 also includes: when the random access message failure count of the first network connection is greater than a first threshold, when the random access message failure count of the first network connection is greater than a second threshold, or when the scheduling request failure count of the first network connection is greater than a third threshold, giving priority to the first network connection over the second network connection.

[0211] Aspect 8: The method according to any one of Aspects 1 to 7 further includes: giving priority to the first network connection over the second network connection at least in part based on a timing conflict between a first set of sending opportunities associated with a first call performed on the first network connection and a second set of sending opportunities associated with a second call performed on the first network connection.

[0212] Aspect 9: A method according to Aspect 8, wherein the first call, the second call, or both include an E-911 call, an Internet Protocol (IP) Multimedia System (IMS) call, an Internet Protocol Voice (VoIP) call, a Long Term Evolution Voice (VoLTE) call, a 5G NR Voice (VoNR) call, a video phone call, or any combination thereof.

[0213] Aspect 10: The method according to any one of aspects 1 to 9 also includes: prioritizing the first network connection over the second network connection based at least in part on a first discontinuous reception process associated with the first network connection and a second discontinuous reception process associated with the second network connection.

[0214] Aspect 11: The method according to aspect 10 further comprises: prioritizing the first network connection over the second network connection based at least in part on a timing conflict between a first on-duration of the first discontinuous reception process and a second on-duration of the second discontinuous reception process.

[0215] Aspect 12: The method according to any one of Aspects 1 to 11 also includes: giving priority to the first network connection over the second network connection based on a transmit antenna selected for the first network connection through a transmit antenna switching diversity feature, a timing conflict between the first network connection and the second network connection, or a combination thereof.

[0216] Aspect 13: The method according to aspect 12 further comprises: semi-statically prioritizing the first network connection over the second network connection based on the transmit antenna selected by the transmit antenna switching diversity feature.

[0217] Aspect 14: The method according to any one of Aspects 12 to 13 also includes: dynamically prioritizing the first network connection over the second network connection based on the transmit antenna selected by the transmit antenna switching diversity feature, and one of the subframe timing of the first network connection or the activity timing of the first network connection.

[0218] Aspect 15: The method according to any one of Aspects 1 to 14 further includes: when the first network connection includes critical services or critical control signaling, giving priority to the first network connection over the second network connection.

[0219] Aspect 16: A method according to any one of Aspects 1 to 15, wherein the first network connection includes a Long Term Evolution (LTE) connection and the second network connection includes a fifth generation (5G) new radio (NR) connection, or the first network connection includes a first 5G NR connection and the second network connection includes a second 5G NR connection.

[0220] Aspect 17: The method according to any one of aspects 1 to 16, wherein the second SRS antenna switching capability is reduced relative to the first SRS antenna switching capability by masking at least one New Radio (NR) SRS antenna.

[0221] Aspect 18: An apparatus comprising: a processor; a memory coupled to the processor; and instructions, the instructions being stored in the memory and executable by the processor to cause the apparatus to perform a method according to any one of aspects 1 to 17.

[0222] Aspect 19: An apparatus comprising at least one unit for performing the method according to any one of aspects 1 to 17.

[0223] Aspect 20: A non-transitory computer-readable medium storing code, the code comprising instructions executable by a processor to perform the method according to any one of aspects 1 to 17.

[0224] Although aspects of LTE, LTE-A, LTE-A Professional, or NR systems may be described for purposes of example, and LTE, LTE-A, LTE-A Professional, or NR terminology may be used in much of the description, the techniques described herein may be applicable beyond LTE, LTE-A, LTE-A Professional, or NR networks. For example, the techniques described may be applicable to various other wireless communication systems, such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0225] The information and signals described herein may be represented using any of a variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the description may be represented by voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0226] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or executed using a general purpose processor, DSP, ASIC, CPU, FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, a combination of one or more microprocessors and a DSP core, or any other such configuration).

[0227] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or sent through a computer-readable medium as one or more instructions or codes. Other examples and implementations are within the scope of the present disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented in software executed by a processor, hardware, firmware, hard wiring, or any combination of these. Features that implement the functions may also be physically located at various locations, including being distributed so that parts of the functions are implemented at different physical locations.

[0228] Computer readable medium includes both non-transitory computer storage medium and communication medium, and communication medium includes any medium that promotes the transmission of computer program from one place to another place.Non-transitory storage medium can be any available medium that can be accessed by general-purpose computer or special-purpose computer.By way of example and not limitation, non-transitory computer readable medium can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage, disk storage or other magnetic storage device, or can be used for carrying or storing desired program code unit and can be accessed by general-purpose or special-purpose computer or general-purpose or special-purpose processor in the form of instruction or data structure.In addition, any connection is appropriately referred to as computer readable medium.For example, if software is to send from website, server or other remote source using coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL) or wireless technology such as infrared, radio and microwave, then coaxial cable, optical fiber cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are included in the definition of computer readable medium. As used herein, disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, wherein disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

[0229] As used herein (including in the claims), "or" as used in a list of items (e.g., a list of items ending with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (e.g., A and B and C). In addition, as used herein, the phrase "based on" should not be interpreted as a reference to a closed set of conditions. For example, an example step described as "based on condition A" can be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on."

[0230] In the accompanying drawings, similar components or features may have the same reference number. In addition, various components of the same type may be distinguished by following the reference number with a dash and a second reference number, the second reference number being used to distinguish between similar components. If only the first reference number is used in the specification, the description applies to any of the similar components having the same first reference number, without regard to the second reference number or other subsequent reference numbers.

[0231] The descriptions set forth herein in conjunction with the accompanying drawings describe example configurations and do not represent all examples that may be implemented or within the scope of the claims. The term "example" as used herein means "used as an example, instance, or illustration," rather than "preferred" or "advantageous over other examples." For the purpose of providing an understanding of the described techniques, the detailed description includes specific details. However, these techniques may be implemented without these specific details. In some instances, structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0232] To enable those skilled in the art to implement or use the present disclosure, the description herein is provided. It will be apparent to those skilled in the art that various modifications to the present disclosure will be apparent, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but is given the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method of wireless communication at a user equipment (UE), the UE having multiple transmit antennas shared between a first network connection and a second network connection in a dual connectivity mode, the method comprising: reporting to a network node a first sounding reference signal (SRS) antenna switching capability associated with the plurality of transmit antennas that can be used for communications via the second network connection; transmitting one or more signals via the first network connection using one or more transmit antennas in a transmission time interval, wherein the one or more transmit antennas are selected from the plurality of transmit antennas based at least in part on a priority ranking between the first network connection and the second network connection; and When the first network connection takes precedence over the second network connection, during the transmission time interval and at least in part based on the UE operating in the dual connectivity mode during the transmission time interval, an SRS is sent to the network node via the second network connection and based on a second SRS antenna switching capability, wherein the second SRS antenna switching capability is selected at least in part based on the one or more transmit antennas used to transmit the one or more signals, wherein the second SRS antenna switching capability is reduced relative to the first SRS antenna switching capability reported to the network node by masking at least one of the one or more transmit antennas used to transmit the one or more signals.

2. The method according to claim 1, further comprising: When the second network connection takes precedence over the first network connection, the SRS is transmitted via the first SRS antenna switching capability.

3. The method according to claim 1, further comprising: When the first network connection comprises a high priority call type, or when an uplink activity of the first network connection is greater than a threshold, the first network connection is prioritized over the second network connection according to the priority ranking.

4. The method according to claim 3, wherein: The high priority call types include E-911 calls, Internet Protocol (IP) Multimedia System (IMS) calls, Internet Protocol Voice (VoIP) calls, Long Term Evolution Voice (VoLTE) calls, 5GNR Voice (VoNR) calls, video phone calls, or any combination thereof.

5. The method according to claim 1, further comprising: When a control channel downlink grant rate of the first network connection is greater than a first threshold, or when a control channel uplink grant rate of the first network connection is greater than a second threshold, the first network connection is prioritized over the second network connection according to the priority sorting.

6. The method according to claim 1, further comprising: When the control channel downlink grant rate of the first network connection is greater than a first threshold and the signal-to-noise ratio (SNR) of the first network connection is less than a third threshold, or when the control channel uplink grant rate of the first network connection is greater than a second threshold and the power headroom (PHR) of the first network connection is less than a fourth threshold, the first network connection is given priority over the second network connection according to the priority sorting.

7. The method according to claim 1, further comprising: When the random access message one failure count of the first network connection is greater than a first threshold, when the random access message three failure count of the first network connection is greater than a second threshold, or when the scheduling request failure count of the first network connection is greater than a third threshold, the first network connection is prioritized over the second network connection according to the priority sorting.

8. The method according to claim 1, further comprising: The first network connection is prioritized over the second network connection according to the priority ranking based at least in part on a timing conflict between a first set of transmission opportunities associated with a first call executed on the first network connection and a second set of transmission opportunities associated with a second call executed on the second network connection.

9. The method according to claim 8, wherein: The first call, the second call, or both include an E-911 call, an Internet Protocol (IP) Multimedia System (IMS) call, an Internet Protocol Voice (VoIP) call, a Long Term Evolution Voice (VoLTE) call, a 5G NR Voice (VoNR) call, a video phone call, or any combination thereof.

10. The method according to claim 1, further comprising: The first network connection is prioritized over the second network connection according to the priority ranking based at least in part on a first discontinuous reception process associated with the first network connection and a second discontinuous reception process associated with the second network connection.

11. The method according to claim 10, further comprising: The first network connection is prioritized over the second network connection according to the priority ranking based at least in part on a timing conflict between a first on-duration of the first discontinuous reception process and a second on-duration of the second discontinuous reception process.

12. The method according to claim 1, further comprising: The first network connection is prioritized over the second network connection according to the priority sorting based on the one or more transmit antennas selected from the plurality of transmit antennas for the first network connection through a transmit antenna switching diversity feature, a timing conflict between the first network connection and the second network connection, or a combination thereof.

13. The method according to claim 12, further comprising: The first network connection is semi-statically prioritized over the second network connection according to the priority ranking based on the one or more transmit antennas selected by the transmit antenna switching diversity feature.

14. The method according to claim 12, further comprising: The first network connection is dynamically prioritized over the second network connection according to the priority sorting based on the one or more transmit antennas selected by the transmit antenna switching diversity feature and one of a subframe timing of the first network connection or an activity timing of the first network connection.

15. The method according to claim 1, further comprising: When the first network connection includes critical services or critical control signaling, the first network connection is prioritized over the second network connection according to the priority sorting.

16. The method according to claim 1, wherein: The first network connection comprises a Long Term Evolution (LTE) connection and the second network connection comprises a Fifth Generation (5G) New Radio (NR) connection, or wherein the first network connection comprises a first 5G NR connection and the second network connection comprises a second 5G NR connection.

17. The method according to claim 1, wherein: The second SRS antenna switching capability is selected based at least in part on one or more antenna crossbar switches shared at the UE across the first network connection and the second network connection.

18. An apparatus for wireless communication at a user equipment (UE), the UE having multiple transmit antennas shared between a first network connection and a second network connection in a dual connectivity mode, the apparatus comprising: means for reporting to a network node a first sounding reference signal (SRS) antenna switching capability associated with the plurality of transmit antennas that can be used for communications via the second network connection; as well as means for transmitting one or more signals via the first network connection using one or more transmit antennas during a transmission time interval, wherein the one or more transmit antennas are selected from the plurality of transmit antennas based at least in part on a priority ranking between the first network connection and the second network connection; and A unit for sending an SRS to the network node via the second network connection and based on a second SRS antenna switching capability during the transmission time interval when the first network connection takes precedence over the second network connection and at least in part based on the UE operating in the dual connectivity mode during the transmission time interval, wherein the second SRS antenna switching capability is selected at least in part based on the one or more transmit antennas used to transmit the one or more signals, wherein the second SRS antenna switching capability is reduced relative to the first SRS antenna switching capability reported to the network node by masking at least one of the one or more transmit antennas used to transmit the one or more signals.

19. The apparatus according to claim 18, further comprising: means for transmitting the SRS via the first SRS antenna switching capability when the second network connection takes precedence over the first network connection.

20. The apparatus of claim 18, further comprising: means for prioritizing the first network connection over the second network connection according to the priority ranking when the first network connection comprises a high priority call type or when an uplink activity of the first network connection is greater than a threshold.

21. The device according to claim 20, wherein: The high priority call types include E-911 calls, Internet Protocol (IP) Multimedia System (IMS) calls, Internet Protocol Voice (VoIP) calls, Long Term Evolution Voice (VoLTE) calls, 5GNR Voice (VoNR) calls, video phone calls, or any combination thereof.

22. The apparatus of claim 18, further comprising: means for prioritizing the first network connection over the second network connection according to the priority sorting when a control channel downlink grant rate of the first network connection is greater than a first threshold or when a control channel uplink grant rate of the first network connection is greater than a second threshold.

23. The apparatus of claim 18, further comprising: A unit for giving priority to the first network connection over the second network connection according to the priority sorting when a control channel downlink grant rate of the first network connection is greater than a first threshold and a signal-to-noise ratio of the first network connection is less than a third threshold, or when a control channel uplink grant rate of the first network connection is greater than a second threshold and a power headroom of the first network connection is less than a fourth threshold.

24. The apparatus of claim 18, further comprising: A unit for giving priority to the first network connection over the second network connection according to the priority sorting when a random access message one failure count of the first network connection is greater than a first threshold, when a random access message three failure count of the first network connection is greater than a second threshold, or when a scheduling request failure count of the first network connection is greater than a third threshold.

25. The apparatus of claim 18, further comprising: Means for prioritizing the first network connection over the second network connection according to the priority ranking based at least in part on a timing conflict between a first set of transmit opportunities associated with a first call executed on the first network connection and a second set of transmit opportunities associated with a second call executed on the second network connection.

26. The device according to claim 25, wherein The first call, the second call, or both include an E-911 call, an Internet Protocol (IP) Multimedia System (IMS) call, an Internet Protocol Voice (VoIP) call, a Long Term Evolution Voice (VoLTE) call, a 5G NR Voice (VoNR) call, a video phone call, or any combination thereof.

27. The apparatus of claim 18, further comprising: Means for prioritizing the first network connection over the second network connection according to the priority ranking based at least in part on a first discontinuous reception procedure associated with the first network connection and a second discontinuous reception procedure associated with the second network connection.

28. The apparatus according to claim 27, further comprising: Means for prioritizing the first network connection over the second network connection according to the priority ranking based at least in part on a timing conflict between a first on-duration of the first discontinuous reception process and a second on-duration of the second discontinuous reception process.

29. The apparatus of claim 18, further comprising: means for prioritizing the first network connection over the second network connection according to the priority ranking based on the one or more transmit antennas selected for the first network connection from the plurality of transmit antennas via a transmit antenna switching diversity feature, a timing conflict between the first network connection and the second network connection, or a combination thereof.

30. The apparatus of claim 29, further comprising: means for semi-statically prioritizing the first network connection over the second network connection according to the priority ranking based on the one or more transmit antennas selected by the transmit antenna switching diversity feature.

31. The apparatus of claim 29, further comprising: means for dynamically prioritizing the first network connection over the second network connection according to the priority ranking based on the one or more transmit antennas selected by the transmit antenna switching diversity feature and one of a subframe timing of the first network connection or an activity timing of the first network connection.

32. The apparatus of claim 18, further comprising: The method further comprises providing a unit for prioritizing the first network connection over the second network connection according to the priority sorting when the first network connection includes critical services or critical control signaling.

33. The apparatus of claim 18, wherein: The first network connection comprises a Long Term Evolution (LTE) connection and the second network connection comprises a Fifth Generation (5G) New Radio (NR) connection, or wherein the first network connection comprises a first 5G NR connection and the second network connection comprises a second 5G NR connection.

34. The apparatus of claim 18, wherein: The second SRS antenna switching capability is selected based at least in part on one or more antenna crossbar switches shared at the UE across the first network connection and the second network connection.

35. An apparatus for wireless communication at a user equipment (UE), the UE having multiple transmit antennas shared between a first network connection and a second network connection in a dual connectivity mode, the apparatus comprising: Memory; as well as at least one processor coupled to the memory, the at least one processor configured to: reporting to a network node a first sounding reference signal (SRS) antenna switching capability associated with the plurality of transmit antennas that can be used for communications via the second network connection; as well as transmitting one or more signals via the first network connection using one or more transmit antennas in a transmission time interval, wherein the one or more transmit antennas are selected from the plurality of transmit antennas based at least in part on a priority ranking between the first network connection and the second network connection; and When the first network connection takes precedence over the second network connection, during the transmission time interval and at least in part based on the UE operating in the dual connectivity mode during the transmission time interval, an SRS is sent to the network node via the second network connection and based on a second SRS antenna switching capability, wherein the second SRS antenna switching capability is selected at least in part based on the one or more transmit antennas used to transmit the one or more signals, wherein the second SRS antenna switching capability is reduced relative to the first SRS antenna switching capability reported to the network node by masking at least one of the one or more transmit antennas used to transmit the one or more signals.

36. The device according to claim 35, wherein The at least one processor is further configured to: When the second network connection takes precedence over the first network connection, the SRS is transmitted via the first SRS antenna switching capability.

37. The device according to claim 35, wherein: The at least one processor is further configured to: When the first network connection comprises a high priority call type, or when an uplink activity of the first network connection is greater than a threshold, the first network connection is prioritized over the second network connection according to the priority ranking.

38. The device according to claim 37, wherein The high priority call types include E-911 calls, Internet Protocol (IP) Multimedia System (IMS) calls, Internet Protocol Voice (VoIP) calls, Long Term Evolution Voice (VoLTE) calls, 5GNR Voice (VoNR) calls, video phone calls, or any combination thereof.

39. The device according to claim 35, wherein: The at least one processor is further configured to: When the control channel downlink grant rate is greater than a first threshold, or when the control channel uplink grant rate is greater than a second threshold, the first network connection is prioritized over the second network connection according to the priority sorting.

40. The apparatus of claim 35, wherein: The at least one processor is further configured to: When the control channel downlink grant rate of the first network connection is greater than a first threshold and the signal-to-noise ratio of the first network connection is less than a third threshold, or when the control channel uplink grant rate of the first network connection is greater than a second threshold and the power margin of the first network connection is less than a fourth threshold, the first network connection is given priority over the second network connection according to the priority sorting.

41. The apparatus of claim 35, wherein: The at least one processor is further configured to: When the random access message one failure count of the first network connection is greater than a first threshold, when the random access message three failure count of the first network connection is greater than a second threshold, or when the scheduling request failure count of the first network connection is greater than a third threshold, the first network connection is prioritized over the second network connection according to the priority sorting.

42. The apparatus of claim 35, wherein: The at least one processor is further configured to: The first network connection is prioritized over the second network connection according to the priority ranking based at least in part on a timing conflict between a first set of transmission opportunities associated with a first call executed on the first network connection and a second set of transmission opportunities associated with a second call executed on the second network connection.

43. The device according to claim 42, wherein: The first call, the second call, or both include an E-911 call, an Internet Protocol (IP) Multimedia System (IMS) call, an Internet Protocol Voice (VoIP) call, a Long Term Evolution Voice (VoLTE) call, a 5G NR Voice (VoNR) call, a video phone call, or any combination thereof.

44. The apparatus of claim 35, wherein: The at least one processor is further configured to: The first network connection is prioritized over the second network connection according to the priority ranking based at least in part on a first discontinuous reception process associated with the first network connection and a second discontinuous reception process associated with the second network connection.

45. The device according to claim 44, wherein The at least one processor is further configured to: The first network connection is prioritized over the second network connection according to the priority ranking based at least in part on a timing conflict between a first on-duration of the first discontinuous reception process and a second on-duration of the second discontinuous reception process.

46. ​​The apparatus of claim 35, wherein: The at least one processor is further configured to: The first network connection is prioritized over the second network connection according to the priority sorting based on the one or more transmit antennas selected from the plurality of transmit antennas for the first network connection through a transmit antenna switching diversity feature, a timing conflict between the first network connection and the second network connection, or a combination thereof.

47. The device according to claim 46, wherein The at least one processor is further configured to: The first network connection is semi-statically prioritized over the second network connection according to the priority ranking based on the one or more transmit antennas selected by the transmit antenna switching diversity feature.

48. The apparatus of claim 46, wherein: The at least one processor is further configured to: The first network connection is dynamically prioritized over the second network connection according to the priority sorting based on the one or more transmit antennas selected by the transmit antenna switching diversity feature and one of a subframe timing of the first network connection or an activity timing of the first network connection.

49. The apparatus of claim 35, wherein: The at least one processor is further configured to: When the first network connection includes critical services or critical control signaling, the first network connection is prioritized over the second network connection according to the priority sorting.

50. The apparatus of claim 35, wherein: The first network connection comprises a Long Term Evolution (LTE) connection and the second network connection comprises a Fifth Generation (5G) New Radio (NR) connection, or wherein the first network connection comprises a first 5G NR connection and the second network connection comprises a second 5G NR connection.

51. The apparatus of claim 35, wherein: The second SRS antenna switching capability is selected based at least in part on one or more antenna crossbar switches shared at the UE across the first network connection and the second network connection.

52. A non-transitory computer readable medium having program code recorded thereon for wireless communication at a user equipment (UE), the UE having multiple transmit antennas shared between a first network connection and a second network connection in a dual connectivity mode, the program code being executable by a processor and comprising: program code for reporting to a network node a first sounding reference signal (SRS) antenna switching capability associated with the plurality of transmit antennas that can be used for communications via the second network connection; program code for transmitting one or more signals via the first network connection using one or more transmit antennas during a transmission time interval, wherein the one or more transmit antennas are selected from the plurality of transmit antennas based at least in part on a priority ranking between the first network connection and the second network connection; and Program code for sending an SRS to the network node via the second network connection and based on a second SRS antenna switching capability during the transmission time interval when the first network connection takes precedence over the second network connection and at least in part based on the UE operating in the dual connectivity mode during the transmission time interval, wherein the second SRS antenna switching capability is selected at least in part based on the one or more transmit antennas used to transmit the one or more signals, wherein the second SRS antenna switching capability is reduced relative to the first SRS antenna switching capability reported to the network node by masking at least one of the one or more transmit antennas used to transmit the one or more signals.

53. The non-transitory computer readable medium of claim 52, further comprising: Program code for transmitting the SRS via the first SRS antenna switching capability when the second network connection takes precedence over the first network connection.

54. The non-transitory computer readable medium of claim 52, further comprising: Program code for prioritizing the first network connection over the second network connection according to the priority ranking when the first network connection comprises a high priority call type or when uplink activity of the first network connection is greater than a threshold.

55. The non-transitory computer readable medium of claim 54, wherein: The high priority call types include E-911 calls, Internet Protocol (IP) Multimedia System (IMS) calls, Internet Protocol Voice (VoIP) calls, Long Term Evolution Voice (VoLTE) calls, 5G NR Voice (VoNR) calls, video phone calls, or any combination thereof.

56. The non-transitory computer readable medium of claim 52, further comprising: for when a control channel downlink grant rate of the first network connection is greater than a first threshold; Or when the control channel uplink grant rate of the first network connection is greater than a second threshold, the program code prioritizes the first network connection over the second network connection according to the priority sorting.

57. The non-transitory computer readable medium of claim 52, further comprising: Program code for prioritizing the first network connection over the second network connection according to the priority sorting when a control channel downlink grant rate of the first network connection is greater than a first threshold and a signal-to-noise ratio of the first network connection is less than a third threshold, or when a control channel uplink grant rate of the first network connection is greater than a second threshold and a power headroom of the first network connection is less than a fourth threshold.

58. The non-transitory computer readable medium of claim 52, further comprising: Program code for giving priority to the first network connection over the second network connection according to the priority sorting when the random access message one failure count of the first network connection is greater than a first threshold, when the random access message three failure count of the first network connection is greater than a second threshold, or when the scheduling request failure count of the first network connection is greater than a third threshold.

59. The non-transitory computer readable medium of claim 52, further comprising: Program code for prioritizing the first network connection over the second network connection according to the priority order based at least in part on a timing conflict between a first set of transmit opportunities associated with a first call executed on the first network connection and a second set of transmit opportunities associated with a second call executed on the second network connection.

60. The non-transitory computer readable medium of claim 59, wherein: The first call, the second call, or both include an E-911 call, an Internet Protocol (IP) Multimedia System (IMS) call, an Internet Protocol Voice (VoIP) call, a Long Term Evolution Voice (VoLTE) call, a 5G NR Voice (VoNR) call, a video phone call, or any combination thereof.

61. The non-transitory computer readable medium of claim 52, further comprising: Program code for prioritizing the first network connection over the second network connection according to the priority ranking based at least in part on a first discontinuous reception process associated with the first network connection and a second discontinuous reception process associated with the second network connection.

62. The non-transitory computer readable medium of claim 61 , further comprising: Program code for prioritizing the first network connection over the second network connection according to the priority ranking based at least in part on a timing conflict between a first on-duration of the first discontinuous reception process and a second on-duration of the second discontinuous reception process.

63. The non-transitory computer readable medium of claim 52, further comprising: Program code for prioritizing the first network connection over the second network connection according to the priority ranking based on the one or more transmit antennas selected from the plurality of transmit antennas for the first network connection via a transmit antenna switching diversity feature, a timing conflict between the first network connection and the second network connection, or a combination thereof.

64. The non-transitory computer readable medium of claim 63, further comprising: Program code for semi-statically prioritizing the first network connection over the second network connection according to the priority ranking based on the one or more transmit antennas selected by the transmit antenna switching diversity feature.

65. The non-transitory computer readable medium of claim 63, further comprising: Program code for dynamically prioritizing the first network connection over the second network connection according to the priority ranking based on the one or more transmit antennas selected by the transmit antenna switching diversity feature and one of a subframe timing of the first network connection or an activity timing of the first network connection.

66. The non-transitory computer readable medium of claim 52, further comprising: Program code for prioritizing the first network connection over the second network connection according to the priority ranking when the first network connection includes critical traffic or critical control signaling.

67. The non-transitory computer readable medium of claim 52, wherein: The first network connection comprises a Long Term Evolution (LTE) connection and the second network connection comprises a Fifth Generation (5G) New Radio (NR) connection, or wherein the first network connection comprises a first 5G NR connection and the second network connection comprises a second 5G NR connection.

68. The non-transitory computer readable medium of claim 52, wherein: The second SRS antenna switching capability is selected based at least in part on one or more antenna crossbar switches shared at the UE across the first network connection and the second network connection.

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