Sounding reference signal antenna switching in dual connectivity mode

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment can determine a collision between one or more sounding reference signal (SRS) resources of an SRS antenna switching procedure to be used for a first radio access technology (RAT) and a signal of a second RAT based at least in part on a time-domain overlap of a transmission of the one or more SRS resources and an active time of the signal of the second RAT, and modify a configuration of the SRS antenna switching procedure to mitigate the collision, where the modified configuration indicates that the one or more SRS resources are configured to be transmitted using antenna elements of the UE that are different from antenna elements of the UE to be used by the UE to receive the signal of the second RAT. Numerous other aspects are provided.

Description

[0001] Cross-reference to related applications

[0002] This patent application claims priority to Indian Provisional Patent Application No. 202041023967, filed June 8, 2020, entitled "SOUNDING REFERENCE SIGNALANTENNA SWITCHING IN A DUAL CONNECTIVITY MODE," and U.S. Non-Provisional Patent Application No. 17 / 074,111, filed October 19, 2020, entitled "SOUNDING REFERENCE SIGNAL ANTENNA SWITCHING IN A DUAL CONNECTIVITY MODE," which are hereby expressly incorporated by reference.

[0003] open field

[0004] Various aspects of this disclosure generally relate to wireless communication, and more particularly to techniques and apparatus for switching probe reference signal (SRS) antennas in dual connectivity modes.

[0005] background

[0006] Wireless communication systems are widely deployed to provide a variety of telecommunications services such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power). 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 an enhancement set of the Universal Mobile Telecommunications System (UMTS) mobile standard issued by the 3rd Generation Partnership Project (3GPP).

[0007] A wireless network may include several base stations (BSs) capable of supporting communication between several user equipments (UEs). UEs can communicate with the base stations (BSs) via downlinks and uplinks. A downlink (or forward link) refers to the communication link from the BS to the UE, while an uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a B-node, gNB, access point (AP), radio headend, transmit / receive point (TRP), new radio (NR) BS, 5G B-node, etc.

[0008] The multiple access technologies mentioned above have been adopted in various telecommunications standards to provide a common protocol enabling different user equipment to communicate at the city, country, region, and even global levels. New Radio (NR) (also known as 5G) is an enhancement set to the LTE mobile standard issued by the 3rd Generation Partnership Project (3GPP). NR is designed to better support mobile broadband internet access by using Orthogonal Frequency Division Multiplexing (OFDM) with a Cyclic Prefix (CP) (CP-OFDM) on the downlink (DL), and CP-OFDM and / or SC-FDM (e.g., also known as Discrete Fourier Transform Extended OFDM (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technologies and carrier aggregation to improve spectral efficiency, reduce costs, improve service, utilize new spectrum, and better integrate with other open standards. Further improvements to LTE, NR, and other radio access technologies remain useful as the demand for mobile broadband access continues to grow.

[0009] Overview

[0010] In some aspects, a wireless communication method performed by a user equipment (UE) may include: determining a conflict between the one or more SRS resources and the signal of the second RAT based at least in part on the time-domain overlap of the transmission of one or more SRS resources for a probe reference signal (SRS) antenna switching procedure for a first radio access technology (RAT) and the active time of the signal of the second RAT; and modifying the configuration of the SRS antenna switching procedure to mitigate the conflict, wherein the modified configuration indicates that the one or more SRS resources are configured to be transmitted using one or more antenna elements of the UE that are different from one or more antenna elements of the UE for receiving the signal of the second RAT.

[0011] In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: determine, at least in part, a conflict between the one or more SRS resources and the signal of the second RAT based on the time-domain overlap of transmissions of one or more SRS resources for a first RAT SRS antenna switching procedure and the active time of the signal of the second RAT; and modify the configuration of the SRS antenna switching procedure to mitigate the conflict, wherein the modified configuration indicates that the one or more SRS resources are configured to be transmitted using one or more antenna elements of the UE that are different from one or more antenna elements of the UE intended to use to receive the signal of the second RAT.

[0012] In some aspects, a non-transient computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of the UE, the one or more instructions may cause the processors to perform the following operations: determine, at least in part, a conflict between the one or more SRS resources and the signal of the second RAT based on the time-domain overlap of the transmission of one or more SRS resources for a first RAT SRS antenna switching procedure and the active time of the signal of the second RAT; and modify the configuration of the SRS antenna switching procedure to mitigate the conflict, wherein the modified configuration indicates that the one or more SRS resources are configured to be transmitted using one or more antenna elements of the UE that are different from one or more antenna elements of the UE intended to use to receive the signal of the second RAT.

[0013] In some aspects, an apparatus for wireless communication may include: means for determining, at least in part, a conflict between the one or more SRS resources and the signal of the second RAT based on the time-domain overlap of transmission of one or more SRS resources for an SRS antenna switching procedure for a first RAT and the active time of the signal of the second RAT; and means for modifying the configuration of the SRS antenna switching procedure to mitigate the conflict, wherein the modified configuration indicates that the one or more SRS resources are configured to be transmitted using one or more antenna elements of the apparatus that are different from one or more antenna elements of the apparatus for receiving the signal of the second RAT.

[0014] The aspects generally include, as substantially described herein with reference to the accompanying drawings and description, and as explained in the accompanying drawings and description, methods, apparatus, systems, computer program products, non-transient computer-readable media, user equipment, base stations, wireless communication equipment and / or processing systems.

[0015] The foregoing has broadly outlined the features and technical advantages of the examples according to this disclosure in an effort to facilitate a better understanding of the following detailed description. Additional features and advantages will be described thereafter. The disclosed concepts and specific examples can be readily used as the basis for modifying or designing other structures for implementing the same purposes as this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, in both their organization and manner of operation, and their associated advantages, will be better understood by considering the following description in conjunction with the accompanying drawings. Each drawing is provided for illustrative and descriptive purposes and not for defining limitations on the claims. Brief description of the attached diagram

[0017] To gain a more detailed understanding of the features described above in this disclosure, reference can be made to various aspects of the above brief overview, some of which are illustrated in the accompanying drawings. However, it should be noted that the drawings illustrate only certain typical aspects of this disclosure and should not be considered as limiting its scope, as other equivalent aspects are permissible in this description. Identical reference numerals in different drawings may identify the same or similar elements.

[0018] Figure 1 This is a diagram illustrating examples of wireless networks according to various aspects of this disclosure.

[0019] Figure 2 This is a diagram illustrating an example of communication between a base station and a UE in a wireless network according to various aspects of this disclosure.

[0020] Figure 3 This is a diagram illustrating an example of the frame structure in a wireless communication network according to various aspects of this disclosure.

[0021] Figure 4 This is a diagram illustrating examples of antenna ports according to various aspects of this disclosure.

[0022] Figure 5 This is a diagram illustrating an example of a discontinuous reception (DRX) configuration according to various aspects of this disclosure.

[0023] Figure 6 This is a diagram illustrating an example of a multi-subscriber identity module (multi-SIM) UE according to various aspects of this disclosure.

[0024] Figure 7 This is a diagram illustrating an example of an antenna switching of the probe reference signal (SRS) in a dual-connectivity mode, according to various aspects of this disclosure.

[0025] Figure 8 This is a diagram illustrating an example process associated with SRS antenna switching in dual connectivity mode according to various aspects of this disclosure.

[0026] Detailed description

[0027] The various aspects of this disclosure are described more fully below with reference to the accompanying drawings. However, this disclosure may be implemented in many different forms and should not be construed as being limited to any specific structure or function given throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art will appreciate that the scope of this disclosure is intended to cover any aspect of this disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of this disclosure. For example, any number of aspects set forth herein may be used to implement an apparatus or method of practice. Furthermore, the scope of this disclosure is intended to cover such apparatus or methods practiced using additional structures, functionalities, or structures and functionalities that complement or supplement the various aspects of this disclosure set forth herein. It should be understood that any aspect of this disclosure disclosed herein may be implemented by one or more elements of the claims.

[0028] Several aspects of a telecommunications system will now be described with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and explained in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively, "elements"). These elements can 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.

[0029] It should be noted that although the aspects may be described herein using terms associated with 5G or NR radio access technology (RAT), the aspects of this disclosure may be applied to other RATs, such as 3G RAT, 4G RAT, and / or RATs after 5G (e.g., 6G).

[0030] Figure 1 This is a diagram illustrating an example of a wireless network 100 according to various aspects of this disclosure. The wireless network 100 may be a 5G (NR) network, an LTE network, etc., or may include elements thereof. The wireless network 100 may include several base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with a user equipment (UE) and may also be referred to as an NR BS, B-node, gNB, 5G B-node (NB), access point, transmit / receive point (TRP), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to the coverage area of ​​a BS and / or the BS subsystem serving that coverage area, depending on the context in which the term is used.

[0031] A BS can provide communication coverage for macrocells, picocells, femtocells, and / or another type of cell. Macrocells can cover a relatively large geographic area (e.g., a radius of several kilometers) and allow unrestricted access by UEs with a service subscription. Picocells can cover a relatively small geographic area and allow unrestricted access by UEs with a service subscription. Femtocells can cover a relatively small geographic area (e.g., a residential area) and allow restricted access by UEs associated with that femtocell (e.g., UEs in a Closed Subscriber Group (CSG)). A BS used for macrocells may be referred to as a macro BS. A BS used for picocells may be referred to as a pico BS. A BS used for femtocells may be referred to as a femto BS or a home BS. Figure 1 In the example shown, BS 110a can be a macro BS for macro cell 102a, BS 110b can be a pico BS for pico cell 102b, and BS 110c can be a femto BS for femto cell 102c. A BS may support one or more (e.g., three) cells. The terms “eNB,” “base station,” “NR BS,” “gNB,” “TRP,” “AP,” “B node,” “5G NB,” and “cell” are used interchangeably herein.

[0032] In some respects, the cell need not be stationary, and the geographical area of ​​the cell can move depending on the location of the mobile BS. In some respects, BSs can interconnect with each other and / or interconnect to one or more other BSs or network nodes (not shown) in the wireless network 100 using any suitable transport network through various types of backhaul interfaces (such as direct physical connections, virtual networks, etc.).

[0033] The wireless network 100 may also include a relay station. A relay station is an entity capable of receiving data transmissions from an upstream station (e.g., a BS or a UE) and transmitting those data transmissions to a downstream station (e.g., a UE or a BS). A relay station may also be a UE capable of relaying transmissions for other UEs. Figure 1 In the example shown, relay station 110d can communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay station may also be referred to as a relay BS, relay base station, relay, etc.

[0034] Wireless network 100 can be a heterogeneous network comprising different types of Base Stations (BSs) (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in wireless network 100. For example, macro BSs may have high transmit power levels (e.g., 5 to 40 watts), while pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 watts).

[0035] Network controller 130 can be coupled to a set of Base Stations (BSs) and can provide coordination and control over these BSs. Network controller 130 can communicate with each BS via backhaul. These BSs can also communicate with each other directly or indirectly, for example, via wireless or wired backhaul.

[0036] UE 120 (e.g., 120a, 120b, 120c) may be distributed throughout the wireless network 100, and each UE may be stationary or mobile. UE may also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. UE may be a cellular phone (e.g., a smartphone), personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet, camera, gaming device, netbook, smartbook, ultrabook, medical device or equipment, biometric sensor / device, wearable device (smartwatch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), entertainment device (e.g., music or video device, or satellite radio), vehicle component or sensor, smart meter / sensor, industrial manufacturing equipment, GPS device, or any other suitable device configured to communicate via wireless or wired media.

[0037] Some UEs can be considered Machine-Type Communication (MTC) UEs, or evolved or enhanced Machine-Type Communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, instruments, monitors, location tags, etc., which can communicate with a base station, another device (e.g., a remote device), or some other entity. Wireless nodes can provide connectivity to or to a network (e.g., a wide area network, such as the Internet) or a cellular network, for example, via wired or wireless communication links. Some UEs can be considered Internet of Things (IoT) devices, and / or can be implemented as NB-IoT (Narrowband Internet of Things) devices. Some UEs can be considered Customer Premises Equipment (CPE). UE 120 can be included within a housing that houses the components of UE 120, such as processor components, memory components, etc. In some aspects, the processor components and memory components can be coupled together. For example, the processor components (e.g., one or more processors) and memory components (e.g., memory) can be operatively coupled, communicatively coupled, electronically coupled, electrically coupled, etc.

[0038] Generally, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific RAT and can operate on one or more frequencies. A RAT may also be referred to as a radio technology, air interface, etc. A frequency may also be referred to as a carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks using different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0039] In some respects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using base station 110 as an intermediary). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, etc.), mesh networks, etc. In this scenario, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0040] As indicated above, Figure 1 This is provided as an example. Other examples may differ from the one provided. Figure 1 The example described.

[0041] Figure 2This is a diagram illustrating an example 200 of communication between a base station 110 and a UE 120 in a wireless network 100 according to various aspects of this disclosure. The base station 110 may be equipped with T antennas 234a to 234t, and the UE 120 may be equipped with R antennas 252a to 252r, wherein generally T≥1 and R≥1.

[0042] At base station 110, transmit processor 220 can receive data destined for one or more UEs from data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on the Channel Quality Indicator (CQI) received from each UE, process (e.g., encode and modulate) the data destined for each UE based at least in part on the MCS selected for each UE, and provide data symbols for all UEs. Transmit processor 220 can also process system information (e.g., semi-static resource allocation information (SRPI) and other) and control information (e.g., CQI requests, grants, upper-layer signaling, etc.), and provide overhead symbols and control symbols. Transmit processor 220 can also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS)), demodulation reference signals (DMRS), etc.) and synchronization signals (e.g., primary synchronization signal (PSS) and secondary synchronization signal (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and can provide T output symbol streams to T modulators (MODs) 232a to 232t. Each modulator 232 can process its own output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 can 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 232a to 232t can be transmitted via T antennas 234a to 234t, respectively.

[0043] At UE 120, antennas 252a to 252r can receive downlink signals from base station 110 and / or other base stations and can provide the received signals to demodulators (DEMODs) 254a to 254r respectively. Each demodulator 254 can condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain an input sample. Each demodulator 254 can further process the input sample (e.g., for OFDM, etc.) to obtain received symbols. MIMO detector 256 can obtain the received symbols from all R demodulators 254a to 254r, perform MIMO detection on these received symbols where applicable, and provide detected symbols. Receiver processor 258 can process (e.g., demodulate and decode) these detected symbols, provide the decoded data for UE 120 to data sink 260, and provide the decoded control information and system information to controller / processor 280. The channel processor can determine the Reference Received Power (RSRP), Received Signal Strength Indicator (RSSI), Reference Received Quality (RSRQ), Channel Quality Indicator (CQI), and so on. In some respects, one or more components of the UE 120 may be included in the housing 284.

[0044] Network controller 130 may include communication unit 294, controller / processor 290, and memory 292. Network controller 130 may include one or more devices, such as those in the core network. Network controller 130 may communicate with base station 110 via communication unit 294.

[0045] On the uplink, at UE 120, transmit processor 264 can receive and process data from data source 262 and control information from controller / processor 280 (e.g., reports including RSRP, RSSI, RSRQ, CQI, etc.). Transmit processor 264 can also generate reference symbols for one or more reference signals. Symbols from transmit processor 264 can be pre-encoded by TX MIMO processor 266 where applicable, further processed by modulators 254a to 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to base station 110. In some aspects, UE 120 includes a transceiver. The transceiver may include (e.g.) antenna 252, modulator and / or demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or any combination of TX MIMO processor 266. The transceiver may be used by a processor (e.g., controller / processor 280) and memory 282 to perform aspects of any of the methods described herein (e.g., as referenced). Figure 7 and 8 (As described).

[0046] At base station 110, uplink signals from UE 120 and other UEs can be received by antenna 234, processed by demodulator 232, detected by MIMO detector 236 where applicable, and further processed by receiver processor 238 to obtain decoded data and control information transmitted by UE 120. Receiver processor 238 can provide the decoded data to data sink 239 and the decoded control information to controller / processor 240. Base station 110 may include communication unit 244 and communicate with network controller 130 via communication unit 244. Base station 110 may include scheduler 246 to schedule UE 120 for downlink and / or uplink communication. In some aspects, base station 110 includes a transceiver. The transceiver may include any combination of antenna 234, modulator and / or demodulator 232, MIMO detector 236, receiver processor 238, transmitter processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform aspects of any of the methods described herein (e.g., as referenced). Figure 7 and 8 (As described).

[0047] The controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component may perform one or more techniques associated with probe reference signal (SRS) antenna switching in dual connectivity mode, as described in more detail elsewhere herein. For example, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component that can execute or direct, for example Figure 8 The operation of process 800 and / or other processes as described herein. Memory 242 and 282 may store data and program code for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include: a non-transitory computer-readable medium storing one or more instructions (e.g., code, program code, etc.) for wireless communication. For example, when executed by one or more processors of base station 110 and / or UE 120 (e.g., directly executed, or executed after compilation, conversion, interpretation, etc.), the one or more processors, UE 120, and / or base station 110 may cause the one or more processors, UE 120, and / or base station 110 to perform or direct, for example... Figure 8 The process 800 and / or other processes as described herein. In some respects, the execution instructions may include run instructions, translate instructions, compile instructions, interpret instructions, etc.

[0048] In some aspects, UE 120 may include: means for determining a conflict between the one or more SRS resources and the signal of the second RAT, at least in part based on the time-domain overlap of transmissions of one or more SRS resources for an SRS antenna handover procedure for a first radio access technology (RAT) and the active time of the signal of the second RAT; means for modifying the configuration of the SRS antenna handover procedure to mitigate the conflict, wherein the modified configuration indicates that the one or more SRS resources are configured to be transmitted using one or more antenna elements of the UE that are different from one or more antenna elements of the UE that the UE intends to use to receive the signal of the second RAT, etc. In some aspects, such means may include combining Figure 2 One or more components of the described UE 120, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, etc.

[0049] although Figure 2 The boxes in the diagram are interpreted as different components, but the functions described above with respect to these boxes can be implemented by a single hardware component, software component, or combination of components. For example, the functions described with respect to transmit processor 264, receive processor 258, and / or TX MIMO processor 266 can be performed by processor 280 or under the control of processor 280.

[0050] As indicated above, Figure 2 This is provided as an example. Other examples may differ from the one provided. Figure 2 The example described.

[0051] Figure 3 This is a diagram illustrating example 300 of the frame structure in a wireless communication network according to various aspects of this disclosure. Figure 3 The frame structure shown is used for Frequency Division Duplex (FDD) in telecommunications systems such as LTE, NR, etc. The transmission timeline for each of the downlink and uplink can be divided into units of radio frames (sometimes called frames). Each radio frame may have a predetermined duration (e.g., 10 milliseconds (ms)) and may be divided into a set of Z (Z≥1) subframes (e.g., with indices 0 to Z-1). Each subframe may have a predetermined duration (e.g., 1 ms) and may include a set of time slots (e.g., in...). Figure 3 The diagram shows 2m time slots per subframe, where m is an index for the parameter design used for transmission, such as 0, 1, 2, 3, 4, etc. Each time slot may include a set of L symbol periods. For example, each time slot may include fourteen symbol periods (e.g., as shown in the diagram). Figure 3(as shown in the diagram), seven symbol periods, or another number of symbol periods. In the case where a subframe includes two time slots (e.g., when m=1), the subframe may include 2L symbol periods, wherein the 2L symbol periods in each subframe can be assigned indices from 0 to 2L–1. In some aspects, the scheduling unit for FDD can be frame-based, subframe-based, time slot-based, mini-time slot-based, symbol-based, etc.

[0052] As indicated above, Figure 3 This is provided as an example. Other examples may differ from the one provided. Figure 3 The example described.

[0053] Figure 4 This is a diagram illustrating example 400 of an antenna port according to various aspects of this disclosure.

[0054] like Figure 4 As shown, the first physical antenna 405-1 can transmit information via the first channel h1, the second physical antenna 405-2 can transmit information via the second channel h2, the third physical antenna 405-3 can transmit information via the third channel h3, and the fourth physical antenna 405-4 can transmit information via the fourth channel h4. This information can be conveyed via a logical antenna port, which can represent a combination of physical antennas and / or channels. In some cases, the UE 120 may not be aware of the channels associated with the physical antennas and may operate solely based on knowledge of the channels associated with the antenna ports, as defined below.

[0055] Antenna ports can be defined such that a channel transmitting symbols on that antenna port can be inferred from a channel transmitting another symbol on the same antenna port. In Example 400, the channel associated with antenna port 1 (AP1) is represented as h1-h2+h3+j*h4, where the channel coefficients (e.g., 1, -1, 1, and j in this case) represent weighting factors (e.g., indicating phase and / or gain) applied to each channel. Such weighting factors can be applied to channels to improve signal power and / or signal quality at one or more receivers. Applying such weighting factors to channel transmission can be called precoding, and a particular set of weighting factors applied to a set of channels can be called a precoder.

[0056] Similarly, the channel associated with antenna port 2 (AP2) is represented as h1 + j * h3, and the channel associated with antenna port 3 (AP3) is represented as 2 * h1 - h2 + (1 + j) * h3 + j * h4. In this case, antenna port 3 can be represented as the sum of antenna port 1 and antenna port 2 (e.g., AP3 = AP1 + AP2), because the sum of the expression representing antenna port 1 (h1 - h2 + h3 + j * h4) and the expression representing antenna port 2 (h1 + j * h3) equals the expression representing antenna port 3 (2 * h1 - h2 + (1 + j) * h3 + j * h4). It can also be said that antenna port 3 is associated with antenna port 1 and antenna port 2 [AP1, AP2] via the precoder [1,1], because 1 multiplied by the expression representing antenna port 1 plus 1 multiplied by the expression representing antenna port 2 equals the expression representing antenna port 3.

[0057] As indicated above, Figure 4 This is provided merely as an example. Other examples may differ from those provided. Figure 4 The example described.

[0058] Figure 5 This is a diagram illustrating an example 500 of a discontinuous reception (DRX) configuration according to various aspects of this disclosure.

[0059] like Figure 5 As shown, base station 110 can transmit DRX configuration to UE 120 to configure DRX cycle 505 for UE 120. DRX cycle 505 may include DRX enable duration 510 (e.g., during which UE 120 is in a wake-up or active state) and an opportunity to enter DRX sleep state 515. As used herein, the time during which UE 120 is configured to be in an active state during DRX enable duration 510 may be referred to as the active time, and the time during which UE 120 is configured to be in DRX sleep state 515 may be referred to as the inactive time. As described below, UE 120 may monitor the Physical Downlink Control Channel (PDCCH) during the active time and may suppress monitoring of the PDCCH during the inactive time.

[0060] During the DRX enable duration 510 (e.g., active time), UE 120 may monitor the downlink control channel (e.g., PDCCH), as indicated by reference numeral 520. For example, UE 120 may monitor the PDCCH to look for downlink control information (DCI) associated with UE 120. If, during the DRX enable duration 510, UE 120 does not detect and / or successfully decode any PDCCH communication intended for use by UE 120, UE 120 may enter a sleep state 515 (e.g., for an inactive period) at the end of the DRX enable duration 510, as indicated by reference numeral 525. In this way, UE 120 can conserve battery power and reduce power consumption. As shown, the DRX cycle 505 can be configured to repeat periodically according to the DRX configuration.

[0061] If UE 120 detects and / or successfully decodes PDCCH communication intended for UE 120, UE 120 may remain in an active state (e.g., wake-up) for the duration of DRX inactivity timer 530 (e.g., this may extend the active time). UE 120 may start DRX inactivity timer 530 at the time of receiving PDCCH communication (e.g., within the Transmission Time Interval (TTI) of receiving PDCCH communication, such as a time slot, subframe, etc.). UE 120 may remain in an active state until DRX inactivity timer 530 expires, at which point UE 120 may enter a sleep state 515 (e.g., for an inactive period), as indicated by reference numeral 535. During the duration of the DRX inactive timer 530, UE 120 can continue to monitor PDCCH communications, acquire downlink data communications scheduled by PDCCH communications (e.g., on a downlink data channel, such as the Physical Downlink Shared Channel (PDSCH)), prepare and / or transmit uplink communications scheduled by PDCCH communications (e.g., on the Physical Uplink Shared Channel (PUSCH)), and so on. UE 120 can restart the DRX inactive timer 530 after each detection of PDCCH communications for initial transmission (e.g., but not for retransmission) for UE 120. By operating in this manner, UE 120 can conserve battery power and reduce power consumption by entering sleep state 515.

[0062] As indicated above, Figure 5 This is provided as an example. Other examples may differ from the one provided. Figure 5 The example described.

[0063] Figure 6 This is a diagram illustrating example 600 of a multi-subscriber identity module (multi-SIM) UE according to various aspects of this disclosure. For example... Figure 6As shown, UE 120 can be a multi-SIM UE comprising multiple SIMs (two or more SIMs), shown as a first SIM 605a and a second SIM 605b. The first SIM 605a may be associated with a first subscription (shown as SUB 1), and the second SIM 605b may be associated with a second subscription (shown as SUB 2). Subscriptions may include subscriptions to a network operator (e.g., a mobile network operator (MNO)) that enable UE 120 to access a wireless network (e.g., a radio access network (RAN)) associated with that network operator.

[0064] SIM 605 can be a removable SIM (e.g., a SIM card) or an embedded SIM. SIM 605 may include an integrated circuit that securely stores the International Mobile Subscriber Identity (IMSI) and a security key, which is used to identify and authenticate the corresponding subscription associated with SIM 605. In some cases, SIM 605 may store a list of permitted services that UE 120 can access using the subscription associated with SIM 605, such as data services or voice services, etc.

[0065] like Figure 6 As further shown, UE 120 can communicate with first base station 610a via first SIM 605a through first cell 615a (shown as cell 1) (e.g., in connected mode, idle mode, or inactive mode). In this case, UE 120's first subscription (SUB 1) can be used to access first cell 615a (e.g., using the first IMSI for UE identification, using the first security key for UE authentication, using a first list of services that UE 120 is allowed to access using the first subscription, or counting data or voice usage on the first cell by referring to the first subscription, etc.). Similarly, UE 120 can communicate with second base station 610b via second cell 615b (shown as cell 2) using second SIM 605b (e.g., in connected mode, idle mode, or inactive mode). In this scenario, the second subscription (SUB 2) of UE120 can be used to access the second cell 615b (e.g., using the second IMSI for UE identification, using the second security key for UE authentication, using the second service list that UE120 is allowed to access using the second subscription, or counting data or voice usage on the second cell by referring to the second subscription, etc.).

[0066] The first base station 610a and / or the second base station 610b may include the above combination Figure 1One or more of the described base stations 110. Although the first cell 615a and the second cell 615b are shown as being provided by different base stations, in some respects, the first cell 615a and the second cell 615b may be provided by the same base station. Thus, in some respects, the first base station 610a and the second base station 610b may be integrated into a single base station.

[0067] In some scenarios, UE 120 can be a single-receiver (SR) (sometimes also referred to as a single-radio) multi-SIM UE, such as an SR multi-SIM multi-standby (SR-MSMS) UE or a single-receiver dual-SIM dual-standby (SR-DSDS) UE, etc. Multi-SIM UEs can be able to switch between two separate mobile network services and may include hardware for maintaining multiple connections in standby mode (e.g., one connection per SIM), or may include hardware for maintaining multiple network connections simultaneously (e.g., multiple transceivers), etc. However, an SR-DSDS UE or SR-MSMS UE may only receive data on one connection at a time because radio frequency resources are shared among multiple subscriptions. For example, an SR-DSDS UE or SR-MSMS UE may be associated with multiple subscriptions, but may only include a single transceiver shared by multiple subscriptions, a single transmit chain shared by multiple subscriptions, or a single receive chain shared by multiple subscriptions, etc.

[0068] In some scenarios, a multi-SIM UE's first subscription can communicate with a first cell using a first RAT (e.g., an NR RAT, etc.), and a multi-SIM UE's second subscription can communicate with a second cell using a second RAT (e.g., an LTE RAT, etc.). Multi-SIM UEs can operate in either self-contained (SA) or non-self-contained (NSA) mode. For example, a multi-SIM UE can operate in Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) NRDC (ENDC) mode.

[0069] In some scenarios, a multi-SIM UE can support Probe Reference Signal (SRS) switching capability for transmitting SRS to a first cell (e.g., to indicate downlink channel state information (CSI) with reciprocity between uplink and downlink channels). SRS handover capability can indicate the number of antenna elements (e.g., antenna ports, antennas, antenna modules, etc.) associated with an SRS antenna handover procedure (e.g., the number of antennas on which the multi-SIM UE will transmit SRS during the SRS antenna handover procedure, etc.). A multi-SIM UE can use shared antenna elements (e.g., using antenna elements shared with the SRS antenna handover procedure) to receive signals from a second cell. However, if a multi-SIM UE needs to use one or more antenna elements to transmit SRS, and simultaneously needs to use the same one or more antenna elements to receive / decode signals from a second cell, the multi-SIM UE must discard the SRS (e.g., not transmit SRS) to avoid damaging the one or more antenna elements and / or causing problems receiving / decoding signals from the second cell. This can lead the first cell to determine that one or more antenna elements associated with the dropped SRS are associated with poor channel conditions (e.g., at least in part based on the SRS antenna handover procedure). However, since both the SRS antenna handover procedure and the signal from the second cell can be periodic, the multi-SIM UE can periodically (e.g., continuously) drop SRS that would otherwise be transmitted using certain antenna elements. As a result, the first cell can schedule transmissions without using one or more antenna elements, reducing the number of downlink MIMO layers, etc., even if those one or more antenna elements are not actually associated with poor channel conditions. This can negatively impact communication performance between the multi-SIM UE and the first cell, as well as key performance indicators (KPIs) between the multi-SIM UE and the first cell.

[0070] Some techniques and apparatus described herein enable a UE to perform SRS antenna handover in dual connectivity modes (e.g., multi-SIM mode, NSA mode, etc.) by allowing the UE to map SRS resources used for SRS antenna handover procedures (e.g., for a first RAT, such as NR, etc.) to antenna elements that do not conflict with signals used for a second RAT (e.g., LTE RAT, etc.). For example, the UE can determine conflicts at least in part based on the determination that SRS resources to be used for SRS antenna handover are being transmitted simultaneously with the UE's reception and / or decoding of signals for the second RAT. The UE can be enabled to map SRS resources(s) that conflict with signals for the second RAT to antenna elements that are not shared with one or more antenna elements used for receiving and / or decoding transmissions for the second RAT. As a result, the UE can use all antenna elements associated with the SRS antenna handover procedure (e.g., without discarding SRS transmissions) to perform the SRS antenna handover procedure without affecting the reception / decoding of signals for the second RAT. This saves resources that would otherwise be used to discard SRS resources that conflict with signals for the second RAT. Furthermore, this improves communication performance between the UE and the first cell because it enables the first cell to accurately determine the channel conditions for each antenna port of the UE (e.g., because the UE does not need to drop one or more SRSs due to interference with the signal of the second RAT).

[0071] As indicated above, Figure 6 This is provided as an example. Other examples may differ from the one provided. Figure 6 The example described.

[0072] Figure 7 This is a diagram illustrating example 700 associated with SRS antenna switching in a dual-connectivity mode according to various aspects of this disclosure. (See diagram for example.) Figure 7 As shown, UE 120 can communicate with a first cell (e.g., with a first base station 110) and a second cell (e.g., with a second base station 110).

[0073] UE 120 can be a multi-SIM UE 120 (e.g., it can operate in a multi-SIM mode). For example, the first SIM of UE 120 can use a first radio access technology (RAT) (e.g., NR RAT, etc.) to communicate with a first cell (e.g., with a first base station 110). The second SIM of UE 120 can use a second RAT (e.g., LTE RAT, etc.) to communicate with a second cell (e.g., with a second base station 110). In some aspects, the first SIM can communicate with the first cell in a connected mode (e.g., Radio Resource Control (RRC) connected mode, etc.). The second SIM can communicate with the second cell in an idle mode. In some aspects, UE 120 can use shared antenna elements (e.g., antenna, antenna port, antenna module, antenna switch, etc.) to communicate with both the first and second cells.

[0074] As shown by reference numeral 705 in the attached figure, UE 120 may receive SRS configuration from the first cell. The SRS configuration may be an SRS resource set configuration. In some aspects, the first cell may transmit an indication of the SRS resource set configuration to UE 120 in signaling communications such as RRC communications, Media Access Control (MAC) Control Element (MAC-CE) communications, Downlink Control Information (DCI) communications, etc.

[0075] The SRS resource set configuration can indicate the configuration of one or more SRS resource sets that UE 120 can use to transmit SRS to the first cell. An SRS resource set can include one or more SRS resources, each SRS resource can include time resources or frequency resources (e.g., time slots, symbols, resource blocks, periodicity of time resources, etc.). The SRS resource set configuration can map SRS resources to one or more antenna ports of UE 120 (such as antenna port 1, antenna port 2, etc.). Thus, the SRS resource set configuration can indicate one or more time-frequency resources in which SRS is to be transmitted, and can indicate one or more antenna ports in which SRS is to be transmitted.

[0076] Furthermore, in some aspects, the SRS resource set configuration can indicate use cases for the SRS resource set (e.g., in the SRS-SetUse information element). For example, the SRS resource set can have use cases for antenna switching, codebook, non-codebook, beam management, and so on.

[0077] Antenna-switching SRS resource sets can be used to indicate downlink channel state information (CSI) with reciprocity between uplink and downlink channels. For example, when reciprocity exists between uplink and downlink channels, base station 110 (e.g., in a first cell) can use antenna-switching SRS (e.g., SRS transmitted using resources in the antenna-switching SRS resource set) to capture downlink CSI (e.g., to determine the downlink precoder to be used for communication with UE 120). For example, in a time-division duplex (TDD) multiple-input multiple-output (MIMO) communication system, SRS can be used for reciprocity-based beamforming. For example, UE 120 can transmit SRS in the uplink channel, and base station 110 can receive the SRS. Base station 110 can use the SRS to estimate the channel conditions of the uplink channel and can use the estimated channel conditions of the uplink channel to perform beamforming and / or precoding for the corresponding downlink channel.

[0078] In some respects, UE 120 may have more receive (Rx) resources than transmit (Tx) resources. For example, UE 120 may have more Rx antennas (e.g., four, etc.) than Tx chains (e.g., two, etc.), thus UE 120 may be restricted to transmitting uplink communication on one of the antennas. Additionally or alternatively, UE 120 may support more frequency bands / carriers for downlink carrier aggregation (e.g., three, etc.) than Tx chains (e.g., one, etc.) of UE 120, thus UE 120 may be restricted to transmitting uplink communication in one of the frequency bands. The asymmetry between Rx or downlink resources and Tx or uplink resources may limit reciprocity-based beamforming because base station 110 cannot estimate all channels, thus UE 120 may only be able to transmit on some antennas and / or frequency bands. To assist reciprocity-based beamforming, UE 120 may be able to switch Tx resources between different antennas and / or frequency bands (e.g., carriers). For example, when UE 120 has more Rx antennas than Tx chain, antenna switching can allow UE 120 to transmit SRS from multiple antennas.

[0079] The SRS configuration used for antenna switching can be at least partially based on the SRS antenna switching capability reported by UE 120. In some aspects, UE 120 may report SRS antenna switching capability where the number of Tx chains of UE 120 is not equal to the number of Rx chains of UE 120. As a result, UE 120 may need to perform antenna switching (e.g., between Tx chains, Tx antennas, Tx antenna ports, etc.) to transmit SRS for downlink channel estimation corresponding to all Rx chains (e.g., because there are fewer Tx chains than Rx chains in UE 120).

[0080] Additionally or alternatively, antenna switching capability can indicate the number of Tx and Rx antennas that UE 120 can switch between. For example, antenna switching capability can indicate that UE 120 can switch between 1 Tx antenna and 2 Rx antennas (1T2R), between 1 Tx antenna and 4 Rx antennas (1T4R), between 2 Tx antennas and 4 Rx antennas (2T4R), between 4 Tx antennas and 4 Rx antennas (4T4R), or between an equal number of Tx antennas and Rx antennas (T=R). For example, for a 2T4R UE with 2 Tx chains and 4 Rx chains, UE 120 can transmit SRS twice on each of the 2 Tx chains (e.g., using antenna switching) to probe the channel of each of the 4 Rx chains. Similarly, for a 1T4R UE with 1 Tx chain and 4 Rx chains, UE 120 can transmit SRS four times on a single Tx chain (e.g., using antenna switching) to probe the channel of each of the 4 Rx chains (e.g., using four different antennas of UE 120 to transmit SRS resources).

[0081] For example, for a 1T4R SRS antenna switching capability, the SRS configuration can indicate the SRS resource set configuration. The resource set can include four SRS resources. The SRS configuration can instruct UE 120 to transmit one SRS resource on each of the four Rx antennas of UE 120 using a single Tx chain (e.g., using antenna switching). The SRS resource can indicate the periodicity associated with the SRS resource (e.g., indicating the frequency at which the SRS resource is to be transmitted, such as every M time slots and / or symbols, where M is an integer greater than 0). The SRS resource can indicate the offset associated with the SRS resource (e.g., the time slot offset associated with the SRS resource indicates during which the SRS is to be transmitted). The SRS resource can indicate the start symbol and duration (e.g., indicating which symbol in the time slot the SRS resource begins with and the number of symbols associated with the SRS resource). The time slots and / or symbols associated with the SRS resource can be associated with the frame structure of the first RAT (e.g., can be at least partially based on the NR frame structure, etc.).

[0082] In some aspects, the SRS configuration can indicate which Rx antenna to use to transmit SRS resources included in the SRS resource set. In some aspects, the UE 120 can sequentially map SRS resources to Rx antennas (e.g., first SRS resource mapped to first Rx antenna, second SRS resource mapped to second Rx antenna, etc.) to perform SRS antenna switching procedures.

[0083] As shown by reference numeral 710, UE 120 can receive DRX cycle configuration from a second cell (e.g., an LTE cell). The DRX cycle configuration can indicate an on-time duration (e.g., an active time) during which UE 120 can monitor the Physical Downlink Control Channel (PDCCH) to search for downlink signals associated with the second cell. The DRX cycle configuration can indicate a sleep state or inactive time during which UE 120 may not monitor the PDCCH and / or during which UE 120 may be in a reduced-power mode (e.g., for a second subscription associated with the second cell). DRX cycles (e.g., active and inactive states) can repeat according to the configured periodicity of the DRX configuration. For example, the DRX configuration can indicate the starting symbol and duration of an active state for a DRX cycle. The DRX cycle can indicate the periodicity associated with the DRX cycle (e.g., indicating the number of time slots and / or symbols between each active state of the DRX cycle, etc.). The time slots and / or symbols associated with the DRX cycle can be associated with the frame structure of the second RAT (e.g., can be at least partially based on the LTE frame structure, etc.).

[0084] As shown by reference numeral 715, UE 120 can determine, at least in part, that a conflict exists between the one or more SRS resources used for SRS antenna switching and the active time of the signal of the second RAT (e.g., associated with the active time of a DRX cycle), based on the temporal overlap of the transmission of one or more SRS resources for the SRS antenna switching procedure and the active time of the signal of the second RAT. UE 120 can compare the frame structure of the first RAT with the frame structure of the second RAT. UE can determine the frame timing between the frame structure of the first RAT and the frame structure of the second RAT to determine one or more time slots of the first RAT associated with the active time of the signal of the second RAT. For example, UE 120 can determine the time slots and / or symbols of the second RAT associated with the active time of the signal of the second RAT (e.g., associated with the active time of the DRX cycle of the second RAT). In some aspects, UE 120 can determine one or more subframes of the second RAT associated with the active time of the signal of the second RAT, at least in part, based on the DRX cycle. UE120 may compare the frame structure of the second RAT with the frame structure of the first RAT to determine the time slots and / or symbols in the time domain where the active times of the signals of the first RAT and the second RAT overlap. For example, UE120 may determine, at least in part, one or more time slots in the time domain where the active times of one or more subframes of the second RAT and the signals associated with the second RAT are determined based on the frame timing offset between the frame structures of the first RAT and the second RAT and the DRX cycle associated with the signals of the second RAT.

[0085] UE 120 can determine, at least in part, one or more SRS resources whose active time overlaps with the signal of the second RAT in the time domain based on the configured periodicity and / or slot offset associated with one or more SRS resources. UE 120 can determine the periodicity and slot offset of the configured SRS resources to determine in which slots and / or in which symbols within those slots the SRS resources are configured to be transmitted. For example, the SRS resources can be configured to be transmitted every 80 slots (e.g., periodically) and in the 63rd slot from the time of receiving the configuration (e.g., slot offset). Additionally, the SRS resources can be configured to begin with the first symbol (e.g., the start symbol) of the slot and continue for two slots (e.g., the duration). As a result, UE 120 can determine that every 80 slots starting from the 63rd slot from the time of receiving the configuration, the SRS resources are configured to be transmitted in the first two symbols of the slot. UE 120 can determine the timing of other SRS resources configured in the SRS resource configuration in a similar manner.

[0086] UE 120 may determine the time-domain overlap between one or more SRS resources and the active time of the signal of the second RAT, at least in part, based on comparing the time slots and / or symbols in which the active times of the signals of the first RAT and the second RAT overlap in the time domain with the time slots and / or symbols in which one or more SRS resources are configured to be transmitted. In some aspects, because the SRS resources are configured to be transmitted periodically and the DRX cycle of the second RAT repeats periodically, the SRS resources may continuously overlap with the active time of the signal of the second RAT in the time domain.

[0087] In some respects, UE 120 can identify the SRS resources whose active times overlap most frequently with the active times of the second RAT signal in the time domain. For example, UE 120 can identify one or more SRS resources with the maximum number of occurrences of time-domain overlap with the active times of the second RAT signal.

[0088] UE 120 may identify one or more antenna elements (e.g., physical antennas, antenna ports, antenna modules, antenna switches, etc.) that have hardware limitations due to receiving and / or decoding signals of the second RAT. That is, UE 120 may identify one or more antenna elements that will be used to receive and / or decode signals of the second RAT during a DRX cycle. Hardware limitations may include restrictions on antenna elements intended for other purposes (such as for transmitting SRS) during the active period of the second RAT signal (e.g., during the active period of a DRX cycle). For example, UE 120 may use its receiving antenna to receive / monitor signals of a DRX cycle of the second RAT. The receiving antenna may be associated with an antenna module that includes antenna elements or components for receiving and / or decoding signals. In some aspects, the antenna module may be associated with multiple antennas of UE 120. As a result, in some aspects, all antennas associated with the antenna module that will be used to receive and / or decode signals of the second RAT may be associated with hardware limitations as described above. In some respects, only the antenna that will be used to receive and / or decode the signal of the second RAT (e.g., not other antennas associated with the antenna module of that antenna) can be associated with hardware limitations.

[0089] As shown by reference numeral 720, UE 120 may modify the SRS configuration to mitigate one or more conflicts between one or more SRS resources to be used for SRS antenna switching and the active time of the signal of the second RAT. UE 120 may modify one or more antenna elements associated with the SRS resources to be used for SRS antenna switching to mitigate one or more conflicts. For example, UE 120 may identify one or more SRS resources that overlap in the time domain with the active time of the signal of the second RAT, as described above. UE 120 may map one or more SRS resources to antenna elements that UE 120 will not use to receive and / or decode the signal of the second RAT. UE 120 may map one or more SRS resources that do not overlap in the time domain with the active time of the signal of the second RAT (e.g., one or more SRS resources configured to be transmitted during the inactive time of the DRX cycle of the second RAT) to one or more antenna elements to be used to receive and / or decode the signal of the second RAT. Since UE 120 is configured to transmit these one or more SRS resources during the inactive time of the DRX cycle of the second RAT, there may be no hardware restrictions associated with the one or more antenna elements during the time when the one or more SRS resources are configured to be transmitted.

[0090] For example, UE 120 can be associated with six antennas (antenna 1, antenna 2, antenna 3, antenna 4, antenna 5, and antenna 6) and two antenna modules (antenna module 1 (associated with antennas 1, 2, and 3) and antenna module 2 (associated with antennas 4, 5, and 6). The SRS antenna handover capability of UE 120 can be 1T4R, indicating that UE 120 includes one Tx chain and four Rx antennas (e.g., indicating that UE 120 can perform SRS antenna handover among the four Rx antennas). For example, when performing an SRS antenna handover procedure, UE 120 can transmit SRS resources on antennas 2, 3, 5, and 6 according to the SRS resource configuration. UE 120 can use antenna 4 (e.g., and antenna module 2) to monitor, receive, and / or decode signals of the DRX cycle of the second RAT. If SRS resources are mapped to antennas 5 and / or 6 and configured to be transmitted during the active time of the signal in the second RAT, then UE 120... UE 120 may discard (e.g., not transmit) SRS resources due to hardware limitations associated with antenna module 2, as described above. For example, SRS resource configuration may sequentially map SRS resources to antennas (e.g., first SRS resource mapped to antenna 2, second SRS resource mapped to antenna 3, third SRS resource mapped to antenna 5, and fourth SRS resource mapped to antenna 6). If the third SRS resource and / or the fourth SRS resource are configured to be transmitted simultaneously with the active time of the signal of the second RAT, the third SRS resource and / or the fourth SRS resource may be discarded by UE 120, causing the first cell to determine that the downlink channel associated with antenna 5 and / or antenna 6 is bad (e.g., at least in part based on the SRS antenna handover procedure and uplink and downlink channel reciprocity).

[0091] Therefore, UE 120 can map the third SRS resource and / or the fourth SRS resource to the antenna associated with antenna module 1. For example, if UE 120 determines that the third SRS resource is configured to be transmitted simultaneously with the active time of the signal of the second RAT, then UE 120 can map the third SRS resource to antenna 2 or antenna 3. If the remaining SRS resources do not have a time domain overlap with the active time of the signal of the second RAT, then UE 120 can map the remaining SRS resources to the remaining Rx antennas. In some aspects, UE 120 can modify the antenna mapping of SRS resources with the maximum number of time domain overlaps with the active time of the signal of the second RAT. In some aspects, UE 120 can modify the antenna mapping of any SRS resource with a time domain overlap with the active time of the signal of the second RAT.

[0092] As a result, UE 120 can modify its SRS configuration so that UE 120 can use one or more antenna elements to transmit SRS resources while UE 120 monitors, receives, and / or decodes the signals of the second RAT, without affecting the reception and / or decoding of the second RAT signals (e.g., using one or more different antenna elements of UE 120). Therefore, using the example described above, UE 120 can use antennas 2, 3, 5, and 6 to perform the SRS antenna switching procedure, while also using antenna 4 to receive and / or decode the signals of the second RAT.

[0093] In some respects, UE 120 can modify its SRS antenna handover capability to mitigate one or more conflicts. For example, if UE 120's original SRS antenna handover capability is 1T4R, UE 120 can downgrade its SRS antenna handover capability to 1T2R (e.g., indicating that only two Rx antennas can be used for the SRS antenna handover procedure). Therefore, UE 120 can voluntarily discard SRS resources that conflict with the active time of the second RAT signal, rather than discarding SRS resources due to hardware limitations and time-domain overlap, as described above. For example, UE 120 can perform an RRC connection release with the first cell, downgrade UE 120's SRS antenna handover capability, and signal the downgraded SRS antenna handover capability to the first cell. This can instruct the first cell that UE 120 cannot use one or more antenna elements associated with receiving and / or decoding the second RAT signal, rather than the first cell associating the channel associated with those one or more antenna elements with poor channel conditions.

[0094] In some aspects, UE 120 can mitigate one or more conflicts by network-assisted modification of the DRX cyclic configuration associated with UE 120. For example, UE 120 can instruct base station 110 associated with a second cell to modify the DRX cyclic configuration. Base station 110 associated with the second cell can modify the DRX cyclic configuration (e.g., the periodicity associated with the DRX cycle, the on duration associated with the DRX cycle, and / or the inactive time associated with the DRX cycle) to mitigate one or more conflicts. Base station 110 associated with the second cell can configure UE 120 with the modified DRX cyclic configuration. In some aspects, if the DRX cyclic configuration associated with UE 120 is modified, the SRS configuration associated with UE 120 may not be modified (e.g., the SRS configuration and / or the DRX cyclic configuration may be modified to mitigate one or more conflicts).

[0095] As shown by reference numeral 725, according to the modified SRS configuration, UE 120 can use all antenna ports of UE 120 associated with the SRS antenna handover procedure to transmit SRS resources for the SRS antenna handover procedure. As a result, UE 120 can, at least in part, use all antenna elements of UE 120 associated with the SRS antenna handover procedure to perform the SRS antenna handover procedure based on the modified SRS antenna handover procedure configuration. The modified configuration can mitigate or eliminate conflicts between the SRS resources of the SRS antenna handover procedure and the active time of the signal of the second RAT. Therefore, UE 120 can perform the SRS antenna handover procedure without discarding or failing to transmit one or more SRS resources due to hardware limitations, as described above. This allows the first cell to accurately determine the channel conditions associated with all Rx antennas of UE 120.

[0096] As shown by reference numeral 730 in the accompanying drawing, UE 120 can monitor downlink communication from cell 2 according to the DRX configuration. For example, during the active period of the DRX configuration, UE 120 can use one or more antenna elements of UE 120 to monitor, receive, and / or decode signals from cell 2. Since the configuration for the SRS antenna handover procedure may have been modified to mitigate conflicts with the active period of the second RAT signal, as described above, the monitoring, reception, and / or decoding of the second RAT signal can be unaffected by the performance of the SRS antenna handover procedure.

[0097] As a result, UE 120 can perform the SRS antenna handover procedure using all antenna elements associated with it (e.g., without dropping SRS transmissions) without affecting the reception / decoding of the second RAT signal. This saves resources that would otherwise be used to drop SRS signals that conflict with the second RAT. Furthermore, this improves communication performance between UE 120 and the first cell, as it allows the first cell to accurately determine the channel conditions for each antenna port of UE 120 (e.g., because the UE does not need to drop one or more SRS signals due to conflicts with the second RAT signal).

[0098] As indicated above, Figure 7 This is provided as an example. Other examples may differ from the one provided. Figure 7 The example described.

[0099] Figure 8 This is a diagram illustrating, for example, an example process 800 performed by a UE according to various aspects of this disclosure. Example process 800 is an example in which a UE (e.g., UE 120, etc.) performs operations associated with SRS antenna switching in dual connectivity mode.

[0100] like Figure 8 As shown, in some aspects, process 800 may include determining a conflict between the one or more SRS resources and the signal of the second RAT based at least in part on the time-domain overlap of the transmission of one or more SRS resources for the SRS antenna switching procedure to be used for the first RAT and the active time of the signal of the second RAT (block 810). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may determine a conflict between the one or more SRS resources and the signal of the second RAT based at least in part on the time-domain overlap of the transmission of one or more SRS resources for the SRS antenna switching procedure to be used for the first RAT and the active time of the signal of the second RAT, as described above.

[0101] like Figure 8 As further illustrated, in some aspects, process 800 may include modifying the configuration of the SRS antenna switching procedure to mitigate the conflict, wherein the modified configuration indicates that the one or more SRS resources are configured to be transmitted using one or more antenna elements of the UE that are different from one or more antenna elements of the UE that the UE is intended to use to receive the signal of the second RAT (block 820). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may modify the configuration of the SRS antenna switching procedure to mitigate the conflict, as described above. In some aspects, the modified configuration indicates that the one or more SRS resources are configured to be transmitted using one or more antenna elements of the UE that are different from one or more antenna elements of the UE that the UE is intended to use to receive the signal of the second RAT.

[0102] Process 800 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0103] In the first aspect, the UE is in multi-SIM mode, and the first RAT is associated with the first SIM of the UE, and the second RAT is associated with the second SIM of the UE.

[0104] In a second aspect, either alone or in combination with the first aspect, the first RAT is a new radio RAT, and the second RAT is a long-term evolution RAT.

[0105] In a third aspect, either alone or in combination with one or more of the first and second aspects, the signal of the second RAT is associated with a discontinuous reception cycle for the second RAT.

[0106] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the one or more antenna elements of the UE include at least one of the antenna ports of the UE or the antenna modules of the UE.

[0107] In the fifth aspect, determining the conflict between the one or more SRS resources and the signal of the second RAT, either alone or in combination with one or more of the first to fourth aspects, includes: determining the frame structure associated with the first RAT; determining the frame structure associated with the second RAT; and determining the frame timing offset between the frame structure of the first RAT and the frame structure of the second RAT.

[0108] In a sixth aspect, determining the conflict between the one or more SRS resources and the signal of the second RAT, either alone or in combination with one or more of the first to fifth aspects, further comprises: determining a cycle associated with the signal of the second RAT, wherein the cycle indicates one or more subframes of the second RAT associated with the active time of the signal of the second RAT; and determining, at least in part, one or more time slots of the first RAT that overlap in the time domain with the one or more subframes of the second RAT associated with the active time of the signal of the second RAT, based on determining the frame timing offset between the frame structure of the first RAT and the frame structure of the second RAT and the cycle associated with the signal of the second RAT.

[0109] In a seventh aspect, determining the conflict between the one or more SRS resources and the signal of the second RAT, either alone or in combination with one or more of the first to sixth aspects, further comprises: determining, for one of the one or more SRS resources, the periodicity of the SRS resource and the time slot offset of the SRS resource; determining, for the SRS resource, the start symbol and duration associated with the SRS resource; and determining, at least in part, based on the determination of the periodicity of the SRS resource, the time slot offset of the SRS resource, and the start symbol and duration associated with the SRS resource, that the SRS resource is to be transmitted in the one or more time slots in the time domain where the one or more subframes of the second RAT overlap with the active time of the signal of the second RAT, and during the one or more symbol periods in the time domain where the active time of the signal of the second RAT overlaps with the active time of the signal of the second RAT.

[0110] In the eighth aspect, the modification of the configuration of the SRS antenna switching procedure, either alone or in combination with one or more of the first to seventh aspects, includes: determining one or more antenna elements of the UE to be used to receive the signal of the second RAT; and configuring the SRS resource to be transmitted using one or more antenna elements of the UE that are different from the one or more antenna elements of the UE to be used to receive the signal of the second RAT.

[0111] In the ninth aspect, modifying the configuration of the SRS antenna switching procedure, either alone or in combination with one or more of the first to eighth aspects, includes: determining one or more other SRS resources to be used in the SRS antenna switching procedure that do not overlap in the time domain with the active time of the signal of the second RAT; configuring at least one of the one or more other SRS resources to be transmitted using the one or more antenna elements that the UE is to use to receive the signal of the second RAT; and configuring the one or more SRS resources to be transmitted using one or more antenna elements of the UE that are different from the one or more antenna elements that the UE is to use to receive the signal of the second RAT.

[0112] In the tenth aspect, the modification of the configuration of the SRS antenna handover procedure, either alone or in combination with one or more of the first to ninth aspects, includes: transmitting the degraded SRS antenna handover capability of the UE to the base station associated with the first RAT, wherein the degraded SRS antenna handover capability indicates a reduced number of antenna elements available for the SRS antenna handover procedure, such that the one or more antenna elements associated with receiving the signal of the second RAT are not associated with the SRS antenna handover procedure.

[0113] In the eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, process 800 includes performing the SRS antenna handover procedure using all antenna elements of the UE associated with the SRS antenna handover procedure, based at least in part on the configuration of the modified SRS antenna handover procedure.

[0114] although Figure 8 An example box of process 800 is shown, but in some respects, process 800 may include... Figure 8 The boxes depicted in the process are compared to additional boxes, fewer boxes, different boxes, or boxes arranged differently. Additionally or alternatively, two or more boxes of process 800 can be executed in parallel.

[0115] The foregoing disclosure provides explanations and descriptions, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the foregoing disclosure or may be obtained through practice.

[0116] As used herein, the term "component" is intended to be interpreted broadly as hardware, firmware, and / or a combination of hardware and software. As used herein, a processor is implemented using hardware, firmware, and / or a combination of hardware and software. It will be apparent that the systems and / or methods described herein can be implemented in various forms of hardware, firmware, and / or hardware and software combinations. The actual dedicated control hardware or software code used to implement these systems and / or methods is not limiting in any way. Therefore, the operation and behavior of these systems and / or methods are described herein without reference to any specific software code—it is understood that software and hardware can be designed to implement these systems and / or methods, at least in part, based on the description herein.

[0117] As used in this article, depending on the context, satisfying the threshold can mean a value greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc.

[0118] Although specific combinations of features are described in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of aspects. In fact, many of these features can be combined in ways not specifically described in the claims and / or disclosed in the specification. Although each dependent claim listed below may be directly subordinated to only one claim, the disclosure of aspects includes each dependent claim being combined with each other claim in this set of claims. The phrase “at least one of” refers to any combination of these items, including single members. As an example, “at least one of a, b, or c” is intended to cover: a, b, c, ab, ac, bc, and abc, as well as any combination having multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0119] The elements, actions, or instructions used herein should not be construed as critical or necessary unless explicitly stated otherwise. Furthermore, as used herein, the articles “a” and “a certain” are intended to include one or more items and may be used interchangeably with “one or more.” Additionally, as used herein, the article “the” is intended to include one or more items referenced in conjunction with the article “the” and may be used interchangeably with “one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, combinations of related and unrelated items, etc.) and may be used interchangeably with “one or more.” Where only one item is intended, the phrase “only one” or similar language is used. Moreover, as used herein, the terms “have,” “contain,” “include,” etc., are intended to be open-ended terms. Furthermore, the phrase “based on” is intended to mean “at least partially based on” unless otherwise explicitly stated. Moreover, as used herein, the term “or” is intended to be inclusive when used in a sequence and may be used interchangeably with “and / or” unless otherwise explicitly stated (e.g., in combination with “either of” or “only one of”).

Claims

1. A wireless communication method performed by a user equipment (UE), comprising: Receive SRS configuration associated with the probe reference signal SRS antenna switching procedure for the first radio access technology RAT; The conflict between the one or more SRS resources and the signals of the second RAT is determined at least in part based on the time-domain overlap of the transmission of one or more SRS resources to be used for the SRS antenna switching procedure and the active time of the signals of the second RAT. as well as The configuration of the SRS antenna switching procedure is modified to mitigate the conflict, wherein the modified configuration indicates that the one or more SRS resources are configured to be transmitted using one or more antenna elements of the UE that are different from one or more antenna elements of the UE that the UE is to use to receive the signal of the second RAT.

2. The method of claim 1, wherein the UE is in a multi-subscriber identity module multi-SIM mode, and the first RAT is associated with the first subscriber identity module SIM of the UE, and the second RAT is associated with the second SIM of the UE.

3. The method of claim 1, wherein the first RAT is a new radio RAT and the second RAT is a Long Term Evolution RAT.

4. The method of claim 1, wherein the signal of the second RAT is associated with a discontinuous reception cycle for the second RAT.

5. The method of claim 1, wherein the one or more antenna elements of the UE comprise at least one of the following: The antenna port of the UE, or The antenna module of the UE.

6. The method of claim 1, wherein determining the conflict between the one or more SRS resources and the signal of the second RAT comprises: Determine the frame structure associated with the first RAT; Determine the frame structure associated with the second RAT; as well as Determine the frame timing offset between the frame structure of the first RAT and the frame structure of the second RAT.

7. The method of claim 6, wherein determining the conflict between the one or more SRS resources and the signal of the second RAT further comprises: Determine a cycle associated with the signal of the second RAT, wherein the cycle indicates one or more subframes of the second RAT associated with the active time of the signal of the second RAT; as well as The frame timing offset between the frame structure of the first RAT and the frame structure of the second RAT, and the cycle associated with the signal of the second RAT, are used to determine one or more time slots in the time domain where the active time of the first RAT and the signal associated with the second RAT overlap.

8. The method of claim 7, wherein determining the conflict between the one or more SRS resources and the signal of the second RAT further comprises: For one of the one or more SRS resources, determine the periodicity of the SRS resource and the time slot offset of the SRS resource. For the SRS resource in the one or more SRS resources, determine the start symbol and duration associated with the SRS resource; and The SRS resource is determined, at least in part, to be transmitted in one or more time slots in the time domain of one or more subframes of the second RAT that overlap with the active time of the signal associated with the second RAT, and during one or more symbols in the time domain, based on the determination of the periodicity of the SRS resource, the time slot offset of the SRS resource, and the start symbol and duration associated with the SRS resource.

9. The method of claim 8, wherein modifying the configuration of the SRS antenna switching procedure comprises: Determine the one or more antenna elements that the UE will use to receive the signal of the second RAT; as well as The SRS resource is configured to be transmitted using one or more antenna elements of the UE that are different from the one or more antenna elements of the UE that the UE is to use to receive the signal of the second RAT.

10. The method of claim 1, wherein modifying the configuration of the SRS antenna switching procedure comprises: Identify one or more other SRS resources whose active time in the time domain does not overlap with that of the signal of the second RAT for use in the SRS antenna switching procedure; At least one of the one or more other SRS resources is configured to be transmitted using the one or more antenna elements that the UE is to use to receive the signal of the second RAT; as well as The one or more SRS resources are configured to be transmitted using one or more antenna elements of the UE that are different from the one or more antenna elements of the UE that the UE is to use to receive the signal of the second RAT.

11. The method of claim 1, wherein modifying the configuration of the SRS antenna switching procedure comprises: The degraded SRS antenna handover capability of the UE is transmitted to the network node associated with the first RAT, wherein the degraded SRS antenna handover capability indicates a reduced number of antenna elements available for the SRS antenna handover procedure, such that the one or more antenna elements associated with receiving the signal from the second RAT are not associated with the SRS antenna handover procedure.

12. The method of claim 1, further comprising: The SRS antenna handover procedure is executed using all antenna elements of the UE associated with the SRS antenna handover procedure, at least in part, based on the configuration of the modified SRS antenna handover procedure.

13. A user equipment (UE) for wireless communication, comprising: Memory; as well as One or more processors coupled to the memory, the one or more processors being configured to: Receive SRS configuration associated with the probe reference signal SRS antenna switching procedure for the first radio access technology RAT; The conflict between the one or more SRS resources and the signals of the second RAT is determined at least in part based on the time-domain overlap of the transmission of one or more SRS resources to be used for the SRS antenna switching procedure and the active time of the signals of the second RAT. as well as The configuration of the SRS antenna switching procedure is modified to mitigate the conflict, wherein the modified configuration indicates that the one or more SRS resources are configured to be transmitted using one or more antenna elements of the UE that are different from one or more antenna elements of the UE that the UE is to use to receive the signal of the second RAT.

14. The UE of claim 13, wherein the UE is in a multi-subscriber identity module multi-SIM mode, and the first RAT is associated with the first subscriber identity module SIM of the UE, and the second RAT is associated with the second SIM of the UE.

15. The UE of claim 13, wherein the first RAT is a new radio RAT and the second RAT is a long-term evolution RAT.

16. The UE of claim 13, wherein the signal of the second RAT is associated with a discontinuous reception cycle for the second RAT.

17. The UE of claim 13, wherein the one or more antenna elements of the UE comprise at least one of the following: The antenna port of the UE, or The antenna module of the UE.

18. The UE of claim 13, wherein the first RAT is in connected mode and the second RAT is in idle mode.

19. The UE of claim 13, wherein, in order to determine a conflict between the one or more SRS resources and the signal of the second RAT, the one or more processors are configured to: Determine the frame structure associated with the first RAT; Determine the frame structure associated with the second RAT; and Determine the frame timing offset between the frame structure of the first RAT and the frame structure of the second RAT.

20. The UE of claim 19, wherein, in order to determine a conflict between the one or more SRS resources and the signal of the second RAT, the one or more processors are configured to: Determine a cycle associated with the signal of the second RAT, wherein the cycle indicates one or more subframes of the second RAT associated with the active time of the signal of the second RAT; and The frame timing offset between the frame structure of the first RAT and the frame structure of the second RAT, and the cycle associated with the signal of the second RAT, are used to determine one or more time slots in the time domain where the active time of the first RAT and the signal associated with the second RAT overlap.

21. The UE of claim 20, wherein, in order to determine a conflict between the one or more SRS resources and the signal of the second RAT, the one or more processors are configured to: For one of the one or more SRS resources, determine the periodicity of the SRS resource and the time slot offset of the SRS resource. For the SRS resource in the one or more SRS resources, determine the start symbol and duration associated with the SRS resource; and The SRS resource is determined, at least in part, to be transmitted in one or more time slots in the time domain of one or more subframes of the second RAT that overlap with the active time of the signal associated with the second RAT, and during one or more symbols in the time domain, based on the determination of the periodicity of the SRS resource, the time slot offset of the SRS resource, and the start symbol and duration associated with the SRS resource.

22. The UE of claim 21, wherein, in order to modify the configuration of the SRS antenna switching procedure, the one or more processors are configured to: Determine the one or more antenna elements that the UE is to use to receive the signal of the second RAT; and The SRS resource is configured to be transmitted using one or more antenna elements of the UE that are different from those of the UE for receiving the signal of the second RAT.

23. The UE of claim 13, wherein, in order to modify the configuration of the SRS antenna switching procedure, the one or more processors are configured to: Identify one or more other SRS resources whose active time in the time domain does not overlap with that of the signal of the second RAT for use in the antenna switching procedure; At least one of the one or more other SRS resources is configured to be transmitted using the one or more antenna elements that the UE is to use to receive the signal of the second RAT; as well as The one or more SRS resources are configured to be transmitted using one or more antenna elements of the UE that are different from the one or more antenna elements of the UE that the UE is to use to receive the signal of the second RAT.

24. The UE of claim 13, wherein the one or more processors are further configured to: The SRS antenna handover procedure is executed using all antenna elements of the UE associated with the SRS antenna handover procedure, at least in part, based on the configuration of the modified SRS antenna handover procedure.

25. The UE of claim 13, wherein, in order to modify the configuration of the SRS antenna switching procedure, the one or more processors are configured to: The degraded SRS antenna handover capability of the UE is transmitted to the network node associated with the first RAT, wherein the degraded SRS antenna handover capability indicates a reduced number of antenna elements available for the SRS antenna handover procedure, such that the one or more antenna elements associated with receiving the signal from the second RAT are not associated with the SRS antenna handover procedure.

26. A non-transient computer-readable medium storing one or more instructions for wireless communication, said one or more instructions comprising: One or more instructions that, when executed by one or more processors of a user-equipped UE, cause the one or more processors to perform the following operations: Receive SRS configuration associated with the probe reference signal SRS antenna switching procedure for the first radio access technology RAT; The conflict between the one or more SRS resources and the signals of the second RAT is determined at least in part based on the time-domain overlap of the transmission of one or more SRS resources to be used for the SRS antenna switching procedure and the active time of the signals of the second RAT. as well as The configuration of the SRS antenna switching procedure is modified to mitigate the conflict, wherein the modified configuration indicates that the one or more SRS resources are configured to be transmitted using one or more antenna elements of the UE that are different from one or more antenna elements of the UE that the UE is to use to receive the signal of the second RAT.

27. The non-transient computer-readable medium of claim 26, wherein the UE is in a multi-subscriber identity module multi-SIM mode, and the first RAT is associated with the first subscriber identity module SIM of the UE, and the second RAT is associated with the second SIM of the UE.

28. The non-transient computer-readable medium of claim 26, wherein the one or more instructions, when executed by the one or more processors, cause the one or more processors to modify the configuration of the SRS antenna switching procedure, further cause the one or more processors to: Identify one or more other SRS resources whose active time in the time domain does not overlap with that of the signal of the second RAT for use in the SRS antenna switching procedure; At least one of the one or more other SRS resources is configured to be transmitted using the one or more antenna elements that the UE is to use to receive the signal of the second RAT; as well as The one or more SRS resources are configured to be transmitted using one or more antenna elements of the UE that are different from the one or more antenna elements of the UE that the UE is to use to receive the signal of the second RAT.

29. The non-transient computer-readable medium of claim 26, wherein the one or more instructions, when executed by the one or more processors, further cause the one or more processors to: The SRS antenna handover procedure is executed using all antenna elements of the UE associated with the SRS antenna handover procedure, at least in part, based on the configuration of the modified SRS antenna handover procedure.

30. A device for wireless communication, comprising: A means for receiving an SRS configuration associated with a probe reference signal SRS antenna switching procedure for a first radio access technology (RAT). A means for determining, at least in part, a conflict between the one or more SRS resources and the signals of the second RAT based on the time-domain overlap of the transmission of one or more SRS resources to be used in the SRS antenna switching procedure and the active time of the signals of the second RAT. as well as A means for modifying the configuration of the SRS antenna switching procedure to mitigate the conflict, wherein the modified configuration instructs the one or more SRS resources to be transmitted using one or more antenna elements of the device that are different from one or more antenna elements of the device intended to use to receive the signal of the second RAT.

31. The apparatus of claim 30, wherein the means for determining a conflict between the one or more SRS resources and the signal of the second RAT comprises: A means for determining the frame structure associated with the first RAT; A means for determining the frame structure associated with the second RAT; as well as A means for determining the frame timing offset between the frame structure of the first RAT and the frame structure of the second RAT.

32. The apparatus of claim 31, wherein the means for determining a conflict between the one or more SRS resources and the signal of the second RAT further comprises: A means for determining a cycle associated with the signal of the second RAT, wherein the cycle indicates one or more subframes of the second RAT associated with the active time of the signal of the second RAT; as well as A means for determining, at least in part, one or more time slots in the time domain of one or more subframes of the second RAT that overlap with the active time of the signal associated with the second RAT, based on the frame timing offset between the frame structure of the first RAT and the frame structure of the second RAT and the cycle associated with the signal of the second RAT.

33. The apparatus of claim 32, wherein the means for determining a conflict between the one or more SRS resources and the signal of the second RAT further comprises: A means for determining the periodicity of one of the one or more SRS resources and the time slot offset of the SRS resource. A means for determining, for the SRS resource in one or more SRS resources, the start symbol and duration associated with the SRS resource; as well as A means for determining, at least in part, based on the periodicity of the SRS resource, the slot offset of the SRS resource, the start symbol associated with the SRS resource, and the duration, that the SRS resource will be transmitted in one or more slots in the time domain of one or more subframes of the second RAT that overlap with the active time of the signal associated with the second RAT, and during one or more symbols in the time domain that overlap with the active time of the signal associated with the second RAT.

34. The apparatus of claim 33, wherein the means for modifying the configuration of the SRS antenna switching procedure comprises: Means for determining the one or more antenna elements of the device intended for receiving the signal of the second RAT; as well as Means for configuring the SRS resource to be transmitted using one or more antenna elements of the device that are different from the one or more antenna elements of the device intended to receive the signal of the second RAT.

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