Techniques for reusing antennas for multi-component carrier (CC) operation in wireless communications

Abstract

Aspects described herein relate to reusing a transmit or receive antenna from one band to another band, and modifying certain operations accordingly, which can include channel state information (CSI) reporting, sounding reference signal (SRS) transmission, etc.

Description

[0001] Cross-reference to related applications

[0002] This application claims the benefit of U.S. non-provisional application series 18 / 608,708, filed March 18, 2024, entitled “TECHNIQUES FOR RECYCLINGANTENNAS FOR MULTI-COMPONENT CARRIER (CC) OPERATIONS IN WIRELESS COMMUNICATIONS”, the disclosure of which is expressly incorporated herein by reference in its entirety. Technical Field

[0003] All aspects of this disclosure relate to wireless communication systems in general, and more specifically to the reuse of unused antennas for wireless communication.

[0004] Related technical descriptions

[0005] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, message sending and receiving, and broadcasting. These systems can be multiple access systems capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems 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, and Single Carrier Frequency Division Multiple Access (SC-FDMA) systems.

[0006] These multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that enables different wireless devices to communicate at the city, national, regional, and even global levels. For example, fifth-generation (5G) wireless communication technology (which may be referred to as 5G New Radio (5G NR)) is designed to expand and support a diverse range of use cases and applications compared to current mobile network generations. In one aspect, 5G communication technologies can include: enhanced mobile broadband addressing for human-centric use cases for accessing multimedia content, services, and data; ultra-reliable low-latency communication (URLLC) with certain specifications for latency and reliability; and massive machine-type communication that allows the transmission of a very large number of connected devices and a relatively small amount of non-latency-sensitive information. Summary of the Invention

[0007] The following is a simplified summary of one or more aspects to provide a basic understanding of these aspects. This summary is not a broad overview of all anticipated aspects, nor is it intended to identify key or essential elements of all aspects, nor to describe the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that follows.

[0008] According to one aspect, an apparatus for wireless communication is provided, the apparatus comprising: a transceiver; one or more memories configured to store instructions individually or in combination; and one or more processors communicatively coupled to the one or more memories. The one or more processors are individually or in combination configured to execute the instructions to cause the apparatus to: receive a configuration for a first antenna of the apparatus to receive downlink signaling in a first frequency band; receive from a network node an instruction to use the first antenna together with a second antenna of the apparatus to receive downlink signaling in a second frequency band during a time period; and use the first antenna and the second antenna to receive downlink signaling in the second frequency band during the time period.

[0009] In another aspect, an apparatus for wireless communication is provided, the apparatus comprising: a transceiver; one or more memories configured to store instructions individually or in combination; and one or more processors communicatively coupled to the one or more memories. The one or more processors are individually or in combination configured to execute the instructions to cause the apparatus to: receive one or more configurations indicating resources for transmitting SRS to a network node in a first frequency band using each of a plurality of combinations of a plurality of antennas, wherein at least one of the plurality of combinations is based on switching one or more antennas configured for a second frequency band to the first frequency band; and based on switching the one or more antennas configured for the second frequency band to be used in the first frequency band, transmitting SRS to the network node in the first frequency band and using at least one of the plurality of combinations.

[0010] In another aspect, a method for wireless communication at a UE is provided, the method comprising: receiving a configuration for a first antenna of the UE to receive downlink signaling in a first frequency band; receiving from a network node an instruction to use the first antenna together with a second antenna of the UE to receive downlink signaling in a second frequency band during a time period; and using the first antenna and the second antenna to receive downlink signaling in the second frequency band during the time period.

[0011] In another aspect, a method for wireless communication at a UE is provided, the method comprising: receiving one or more configurations indicating resources for transmitting SRS to a network node in a first frequency band using each of a plurality of combinations of a plurality of antennas, wherein at least one of the plurality of combinations is based on switching one or more antennas of the plurality of antennas configured for a second frequency band to the first frequency band; and transmitting SRS to the network node in the first frequency band and using at least one of the plurality of combinations based on switching the one or more antennas of the plurality of antennas configured for the second frequency band to be used in the first frequency band.

[0012] In another aspect, an apparatus for wireless communication is provided, the apparatus comprising: a transceiver; a memory configured to store instructions; and one or more processors communicatively coupled to the transceiver and the memory. The one or more processors are configured to execute instructions to perform operations of the methods described herein. In another aspect, an apparatus for wireless communication is provided, the apparatus including components for performing operations of the methods described herein. In yet another aspect, a computer-readable medium is provided, the computer-readable medium including code executable by one or more processors to perform operations of the methods described herein.

[0013] To achieve the foregoing and related objectives, one or more aspects include the features fully described below and specifically pointed out in the claims. The following description and drawings illustrate some exemplary features of one or more aspects in detail. However, these features indicate only some of the various ways in which the principles of the various aspects may be employed, and this description is intended to include all such aspects and their equivalents. Attached Figure Description

[0014] The disclosed aspects will be described below in conjunction with the accompanying drawings, which are provided for illustration and not limitation of the disclosed aspects, wherein similar names represent similar elements, and in the drawings: Figure 1 Examples of wireless communication systems according to various aspects of this disclosure are illustrated; Figure 2 These are illustrations illustrating examples of decomposed base station architectures according to various aspects of this disclosure; Figure 3 This is a block diagram illustrating examples of user equipment (UE) according to various aspects of this disclosure; Figure 4 This is a block diagram illustrating examples of base stations according to various aspects of this disclosure; Figure 5This is a flowchart illustrating an example of a method for reusing antennas in multi-CC operations, including channel state information (CSI) reporting, according to the aspects described herein; Figure 6 This is a flowchart illustrating an example of a method for configuring a UE to reuse antennas in multi-CC operation, including CSI reports, according to the aspects described herein; Figure 7 This is a flowchart illustrating an example of a method for reusing an antenna in multi-CC operation, including the transmission of a sounding reference signal (SRS), according to the aspects described herein; Figure 8 This is a flowchart illustrating an example of a method for configuring a UE to reuse an antenna in multi-CC operation including SRS transmission, according to the aspects described herein; Figure 9 This is a flowchart illustrating an example of a method for a UE to prioritize communications in which different numbers of antennas are configured, according to the aspects described herein; Figure 10 This is a flowchart illustrating an example of a method for prioritizing communications in which network nodes are configured with different numbers of antennas, according to the aspects described herein; and Figure 11 This is a block diagram illustrating examples of multiple-input multiple-output (MIMO) communication systems including base stations and UEs according to various aspects of this disclosure. Detailed Implementation

[0015] Various aspects will now be described with reference to the accompanying drawings. In the following description, numerous specific details are described for illustrative purposes and to provide a thorough understanding of one or more aspects. However, it will be apparent that such aspects can be practiced without these specific details.

[0016] The described features generally relate to reusing unused antennas for multi-carrier operation in wireless communications. For example, a device (such as a fifth-generation (5G) New Radio (NR) or other wireless communication technology User Equipment (UE)) may include multiple antennas for transmitting uplink communications and / or receiving downlink communications. In a specific example, 3GPP Release 16 specifies one or two transmit chains for switching between frequency bands, where the first frequency band can use a transmit chain from the second frequency band to utilize both transmit chains for transmitting uplink communications on the first frequency band. 3GPP Release 16 defines a Radio Resource Control (RRC) Information Element (IE) "uplinkTxSwitchingOption", which can be set to the value "switchedUL" to indicate no simultaneous uplink transmissions (e.g., one transmit chain for the first frequency band and a different transmit chain for the second frequency band), referred to herein as "Case 1". "uplinkTxSwitchingOption" can also be set to the value "dualUL" to indicate simultaneous uplink transmissions (e.g., both transmit chains for the second frequency band), referred to herein as "Case 2". In dual UL, for example, a first transmit chain used in a first frequency band is loaned out for a second frequency band, such that both the first and second transmit chains are used for transmission in the second frequency band. 3GPP Release 17 provides an enhancement for implementing UL multiple-input multiple-output (MIMO) in two frequency bands when there are a total of two transmit chains. This allows a second transmit chain to be loaned out for the first frequency band, such that both the second and first transmit chains are used for transmission in the first frequency band, which is referred to herein as "Case 3".

[0017] Furthermore, in some examples, one or more ports can be mapped to each transmit chain used. In case 1, where the first and second transmit chains are used for the first and second frequency bands respectively, one port can be assigned to each frequency band, or one port can be assigned to any frequency band. In case 2, where the first and second transmit chains are used for the second frequency band, one or both ports can be assigned to the second frequency band. In case 3, where the first and second transmit chains are used for the second frequency band, one or both ports can be assigned to the first frequency band. Additionally, as described above, transmit chain switching can be beneficial for performing UL MIMO (or typically UL with a larger number of antennas, e.g., single-port transmission with two antennas instead of one) when some antennas on the component carrier (CC) of another frequency band are idle. For example, if for a given time period (such as a time slot), the communication direction of another frequency band is uplink (“U”), but no uplink transmission is scheduled / configured, or if the communication direction of another frequency band is downlink (“D”), the antenna on the other frequency band can be considered idle.

[0018] In some aspects described herein, when the receive antenna is not used in a different frequency band, the UE can reuse the receive antenna (e.g., receive chain) across serving cells in different frequency bands, which can allow for throughput gains when receiving downlink (or sidelink) signaling via the receive antenna. The aspects described herein may relate to identifying potential problems that may arise when the UE is performing UL or DL ​​antenna handover and their associated solutions. For example, when the UE is able to handover transmit and / or receive antennas across different CCs, DL channel estimation and / or UL sounding reference signal (SRS) transmission (for different purposes) may be inaccurate unless there is consensus between the UE and the network node regarding how these antennas are moved.

[0019] In a specific example, during downlink channel estimation in NR, the UE is configured with several Channel State Information (CSI) reporting configurations (up to 48), each CSI reporting configuration being associated with one to three resource settings (e.g., resource settings for Channel Measurement Reporting (CMR), for CMR and CSI-Interference Management (IM) or Non-Zero Power (NZP)-Interference Measurement Reporting (IMR), or for CMR and CSI-IM and NZP-IMR). Each resource setting may have an active resource set, and / or each resource set may have one or more resources. The UE evaluates the CSI corresponding to each CSI-RS resource and reports the best CSI along with the CSI Resource Index (CRI). The reported metrics may include a Pre-decoded Matrix Indicator (PMI), Rank Indicator (RI), Layer Indicator (LI), Channel Quality Indicator (CQI), Layer 1 (L1)-Reference Received Signal Power (RSRP), L1-Signal-to-Interference-plus-Noise Ratio (SINR), etc.

[0020] Currently, in 5G NR where receive antennas are not reused, the number of receive antennas is fixed over time, and CSI reports associated with a given CSI reporting configuration are consistent over time. However, if the UE can change the number and / or configuration of its receive antennas across CCs or frequency bands, CSI reporting may be affected. For example, assuming a CSI reporting configuration with a rank limit of up to four, whether the UE uses four or eight receive antennas during measurement may affect the results—if the UE is using a larger number of antennas, it may be more likely to report rank four. The difference in results may also affect downlink link adaptation and thus DL reception at the UE. The source of the difference may depend on the number of receive antennas the UE uses for CSI measurements and for downlink reception. Therefore, some aspects described herein relate to (e.g., for or by the UE) configuring the number of receive antennas used when receiving CSI-RS and / or corresponding downlink communications to improve the CSI reporting process.

[0021] In another specific example, in 5G NR, SRS can be configured for various purposes, such as antenna switching (for DL ​​CSI acquisition), carrier switching (for probing CCs without a UL), for Physical Uplink Shared Channel (PUSCH) based on non-codebook (CB), beam management, positioning, etc. For antenna switching, the UE can indicate its capability as xTyR (where "x" is the number of transmit antennas and "y" is the number of receive antennas); x also indicates the number of SRS ports that can be probed simultaneously, for example, in the same symbol. The UE can be configured using a set of SRS resources for a given purpose (e.g., antenna switching). Depending on the values ​​of x and y, the UE can be configured with y / x resources for transmitting SRS, where each resource can be used for simultaneous probing of x ports.

[0022] For example, in a legacy system, where a UE is configured with two DL / UL cells and a total of four transmit antennas (which can be assigned across two UL CCs), the UE could assign two antennas to each CC. However, in some examples, using UL transmit antenna handover, all four antennas can be moved to one CC. Assume that at one time, the UE is using all four antennas for UL channel probing on CC0, and at another time, the UE is using all four antennas for UL channel probing on CC1. At a third time, the UE can keep two antennas for transmit on CC1 and move the other two antennas to receive DL from the network node on CC0. In this specific example, the network node might intend to use the channel estimate from the UL probe for DL ​​pre-decoding of DL transmit on CC0, but the network node may not know which UL / SRS ports are kept on CC1 and which ports are moved to CC0 for DL. Therefore, some aspects described herein relate to configuring the UE to transmit SRS for various combinations of transmit and / or receive antennas that can be used during antenna handover.

[0023] In another specific example, for an NCB PUSCH, the UE can use the associated CSI-RS to perform channel estimation, and then, when an SRS resource set is configured for the NCB PUSCH (e.g., the csi-RS field in the SRS-ResourceSet IE based on RRC configuration), it selects how to pre-decode its SRS ports for UL. A network node using the SRI field in the DCI can instruct the UE on how to transmit the PUSCH, where the SRI can point to one or more SRS resources among those the UE uses for UL probing, and the UE can use the same port used for SRS transmission (potentially with the same pre-decoding). To use the SRI to point to the correct SRS resource, the network node may need to know which SRS ports are kept on the same CC (antennas associated with other ports can be moved to another CC / band). As explained in the examples above, the SRS configuration for antenna switching can depend on the xTyR reported by the UE. For example, for a UE capable of xTyR in a given frequency band, on the uplink CC in that reported band, the UE performs SRS handover based on xTyR and thus utilizes appropriate SRS resources for configuration. However, when the UE is capable of receiving or transmitting antenna handover, xTyR may not be fixed (e.g., depending on capabilities, either or both of x and y may change over time). Therefore, some aspects described herein involve configuring the UE using a set of SRS resources that can cover different possibilities for setting x and y.

[0024] Based on the aspects described in this article, the number of antennas available for antenna switching can be considered when reporting or configuring CSI, configuring SRS transmission, etc. This can improve the network node's handling of CSI and / or allow the network node to more effectively design pre-decoders for sending DL communications to the UE, both of which can improve the effectiveness of downlink transmission to the UE.

[0025] The following will refer to Figures 1 to 11 To present the described features in more detail.

[0026] As used in this application, the terms "component," "module," "system," etc., are intended to include computer-related entities such as, but not limited to, hardware, firmware, combinations of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and / or a computer. By way of illustration, both an application running on a computing device and the computing device itself can be components. One or more components may reside within a process and / or an execution thread, and components may be located in one computer and / or distributed among two or more computers. Furthermore, these components are executable from various computer-readable media on which various data structures are stored. Components can communicate via local and / or remote processes, such as based on signals having one or more data packets (e.g., data from a component that interacts with a local system, another component in a distributed system, and / or interacts with other systems across a network such as the Internet).

[0027] As used herein, a processor configured to perform or be operable to perform a plurality of actions, at least one processor, and / or one or more processors (alone or in combination) are intended to include at least two different processors capable of performing different subsets, overlapping subsets, or non-overlapping subsets of the plurality of actions, or a single processor capable of performing all of the plurality of actions. In a non-limiting example of a plurality of processors capable of performing different combinations of the plurality of actions, the description of a processor configured to perform or be operable to perform actions X, Y, and Z, at least one processor, and / or one or more processors may include at least a first processor configured to perform or be operable to perform a first subset of X, Y, and Z (e.g., performing X) and at least a second processor configured to perform or be operable to perform a second subset of X, Y, and Z (e.g., performing Y and Z). Alternatively, the first, second, and third processors may be configured to perform corresponding actions in actions X, Y, and Z, respectively. It should be understood that any combination of one or more processors may each be configured to perform or be operable to perform any one of the plurality of actions or any combination of the plurality of actions.

[0028] As used herein, a memory, at least one memory, and / or one or more memories (individually or in combination) configured to store or have thereon instructions executable by one or more processors for performing multiple actions are intended to include at least two different memories capable of storing different subsets, overlapping subsets, or non-overlapping subsets of instructions for performing the multiple actions, or a single memory capable of storing instructions for performing all of the multiple actions. In a non-limiting example of one or more memories (alone or in combination) capable of storing different subsets of instructions for performing different actions among the plurality of actions, the description of a memory configured or operable to store or thereon instructions for performing actions X, Y, and Z, at least one memory, and / or one or more memories may include at least a first memory configured or operable to store or thereon instructions for performing a first subset of X, Y, and Z (e.g., instructions for performing X), and at least a second memory configured or operable to store or thereon instructions for performing a second subset of X, Y, and Z (e.g., instructions for performing Y and Z). Alternatively, the first, second, and third memories may be configured to store or thereon a corresponding one of the first subset of instructions for performing X, the second subset of instructions for performing Y, and the third subset of instructions for performing Z. It should be understood that any combination of one or more memories may be configured or operable to store or have thereon any instruction or any combination of instructions executable by one or more processors to perform any of a plurality of actions or any combination of such actions. Furthermore, one or more processors may each be coupled to at least one of the one or more memories and configured or operable to execute instructions to perform the plurality of actions. For example, in the above non-limiting example of different subsets of instructions for performing actions X, Y, and Z, a first processor may be coupled to a first memory storing instructions for performing action X, at least a second processor may be coupled to at least a second memory storing instructions for performing actions Y and Z, and the first and second processors may combine to execute the respective subsets of instructions to complete the execution of actions X, Y, and Z. Alternatively, three processors may access one of three different memories, each storing instructions for performing action X, Y, or Z, and the three processors may combine to execute the respective subsets of instructions to complete the execution of actions X, Y, and Z. Alternatively, a single processor may execute instructions stored in a single memory or distributed across multiple memories to complete the execution of actions X, Y, and Z.

[0029] The technologies described herein can be used in various wireless communication systems, such as CDMA, TDMA, FDMA, OFDMA, single-carrier FDMA, and others. The terms "system" and "network" are often used interchangeably. CDMA systems implement radio technologies such as CDMA2000 and Universal Terrestrial Radio Access (UTRA). CDMA2000 encompasses the IS-2000, IS-95, and IS-856 standards. IS-2000 versions 0 and A are commonly referred to as CDMA2000 1X, 1X, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV-DO, High-Rate Packet Data (HRPD), etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. TDMA systems implement radio technologies such as Global System for Mobile Communications (GSM). OFDMA systems can implement radio technologies such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, and Flash-OFDM. ™ UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) and LTE Advanced (LTE-A) are newer versions of UMTS using E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization called the Third Generation Partnership Project (3GPP). CDMA2000 and UMB are described in documents from an organization called the Third Generation Partnership Project 2 (3GPP2). The technologies described herein can be used in the aforementioned systems and radio technologies, as well as in other systems and radio technologies, including cellular (e.g., LTE) communications via shared radio spectrum bands. However, the following description describes LTE / LTE-A systems for illustrative purposes, and the term LTE is used in most of the following description, although these technologies can also be applied beyond LTE / LTE-A applications (e.g., to fifth-generation (5G) New Radio (NR) networks or other next-generation communication systems).

[0030] The following description provides examples and is not intended to limit the scope, applicability, or examples set forth in the claims. Changes may be made to the function and arrangement of the elements discussed without departing from the scope of this disclosure. Various processes or components may be omitted, substituted, or added as appropriate in the various examples. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Furthermore, features described in some examples may be combined in other examples.

[0031] Various aspects or features will be presented according to the system, which may include multiple devices, components, modules, etc. It should be understood and appreciated that various systems may include additional devices, components, modules, etc., and / or may not include all the devices, components, modules, etc. discussed in conjunction with the accompanying drawings. Combinations of these methods may also be used.

[0032] Figure 1 This is an illustration of an example of a wireless communication system and access network 100. The wireless communication system (also referred to as a wireless wide area network (WWAN)) may include a base station 102, a UE 104, an evolved packet core (EPC) 160, and / or a 5G core (5GC) 190. Base station 102 may include macro cells (high-power cellular base stations) and / or small cells (low-power cellular base stations). Macro cells may include base stations. Small cells may include femtocells, picocells, and microcells. In this example, base station 102 may also include a gNB 180, as further described herein. In one example, according to aspects described herein, some nodes of the wireless communication system may have a modem 340 for reusing antennas for multi-CC operation and a UE communication component 342. Furthermore, according to aspects described herein, some nodes may have a modem 440 for configuring a UE with reusing antennas for multi-CC operation and a BS communication component 442. Although UE 104 is shown as having modem 340 and UE communication component 342, and base station 102 / gNB 180 is shown as having modem 440 and BS communication component 442, this is an illustrative example, and essentially any node or any type of node may include modem 340 and UE communication component 342 and / or modem 440 and BS communication component 442 for providing the corresponding functionality described herein.

[0033] Base station 102 configured for 4G LTE (which may be collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can interface with EPC 160 via backhaul link 132 (e.g., using the S1 interface). Base station 102 configured for 5G NR (which may be collectively referred to as Next Generation RAN (NG-RAN)) can interface with 5GC 190 via backhaul link 184. Among other functions, base station 102 can perform one or more of the following functions: user data delivery, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment tracking, RAN information management (RIM), paging, location, and delivery of warning messages. Base stations 102 can communicate directly or indirectly (e.g., via EPC 160 or 5GC 190) on backhaul link 134 (e.g., using an X2 interface). Backhaul link 134 can be wired or wireless.

[0034] Base station 102 can wirelessly communicate with one or more UEs 104. Each base station in base station 102 can provide communication coverage for a corresponding geographic coverage area 110. Overlapping geographic coverage areas 110 may exist. For example, small cell 102' may have a coverage area 110' that overlaps with the coverage areas 110 of one or more macro base stations 102. A network that includes both small cells and macro cells may be referred to as a heterogeneous network. The heterogeneous network may also include a Home Evolved Node B (eNB) (HeNB), which can provide services to restricted groups (which may be referred to as a Closed Subscriber Group (CSG)). The communication link 120 between base station 102 and UE 104 may include uplink (UL) (also known as reverse link) transmission from UE 104 to base station 102 and / or downlink (DL) (also known as forward link) transmission from base station 102 to UE 104. The communication link 120 may use multiple-input multiple-output (MIMO) antenna technologies, including spatial multiplexing, beamforming, and / or transmit diversity. The communication link may carry one or more carriers. Base station 102 / UE104 may use spectrum allocated per carrier up to Y MHz (e.g., 5MHz, 10MHz, 15MHz, 20MHz, 100MHz, 400MHz, etc.) of bandwidth in carrier aggregation for transmissions in the DL and / or UL directions, totaling up to Yx MHz (e.g., corresponding to x component carriers). Carriers may be adjacent to each other or may not be adjacent to each other. Carrier allocation may be asymmetrical for DL ​​and UL (e.g., more or fewer carriers may be allocated to DL than to UL). Component carriers may include primary component carriers and one or more secondary component carriers. The primary component carrier may be referred to as the primary cell (PCell) and the secondary component carrier may be referred to as the secondary cell (SCell).

[0035] In another example, some UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use DL / UL WWAN spectrum. The D2D communication link 158 may use one or more sidelink channels, such as the Physical Sidelink Broadcast Channel (PSBCH), Physical Sidelink Discovery Channel (PSDCH), Physical Sidelink Shared Channel (PSSCH), and Physical Sidelink Control Channel (PSCCH). D2D communication can be achieved through various wireless D2D communication systems, such as FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, LTE, or NR.

[0036] The wireless communication system may also include a Wi-Fi access point (AP) 150 that communicates with a Wi-Fi station (STA) 152 via a communication link 154 in the 5 GHz unlicensed spectrum. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a free channel assessment (CCA) to determine the availability of a channel before communication.

[0037] Small cell 102' can operate in licensed and / or unlicensed spectrum. When operating in unlicensed spectrum, small cell 102' can employ NR, and uses the same 5 GHz unlicensed spectrum as the Wi-Fi AP 150. Small cell 102' employing NR in unlicensed spectrum can improve the coverage of the access network and / or increase the capacity of the access network.

[0038] Base station 102 (whether it is a small cell 102' or a large cell (e.g., a macro base station)) may include an eNB, gNodeB (gNB), or other types of base stations. Some base stations, such as gNB 180, can operate in conventional sub-6 GHz spectrum, millimeter wave (mmW) frequencies, and / or near-mmW frequencies to communicate with UE 104. When gNB 180 operates in mmW or near-mmW frequencies, gNB 180 may be referred to as an mmW base station. Extremely high frequency (EHF) is a portion of the electromagnetic spectrum that contains radio frequency (RF). EHF has a range of 30 GHz to 300 GHz with wavelengths between 1 mm and 10 mm. Radio waves in this band may be referred to as millimeter waves. Near-mmW extends down to frequencies of 3 GHz with wavelengths of 100 mm. Ultra-high frequency (SHF) bands extend between 3 GHz and 30 GHz, and are also referred to as centimeter waves. Communication using mmW / near-mmW radio bands has extremely high path loss and short range. The mmW base station 180 can be used with the UE 104 in conjunction with beamforming 182 to compensate for extremely high path loss and short range. The base station 102 mentioned herein may include the gNB 180.

[0039] EPC 160 may include Mobility Management Entity (MME) 162, other MMEs 164, Serving Gateway 166, Multimedia Broadcast Multicast Service (MBMS) Gateway 168, Broadcast Multicast Service Center (BM-SC) 170, and Packet Data Network (PDN) Gateway 172. MME 162 can communicate with Home Subscriber Server (HSS) 174. MME 162 is the control node that handles signaling between UE 104 and EPC 160. Typically, MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are delivered through Serving Gateway 166, which is itself connected to PDN Gateway 172. PDN Gateway 172 provides UE IP address allocation and other functions. PDN Gateway 172 and BM-SC 170 are connected to IP Service 176. IP Service 176 may include the Internet, intranet, IP Multimedia Subsystem (IMS), PS streaming service, and / or other IP services. The BM-SC 170 provides functions for MBMS user service dispatch and delivery. The BM-SC 170 can act as an entry point for content provider MBMS transmission, authorize and initiate MBMS bearer services in a Public Land Mobile Network (PLMN), and schedule MBMS transmissions. The MBMS gateway 168 can allocate MBMS services to base station 102 belonging to a Broadcast-Specific Service Multicast Single Frequency Network (MBSFN) area, and is responsible for session management (start / stop) and collecting eMBMS-related billing information.

[0040] 5GC 190 may include Access and Mobility Management Functions (AMF) 192, other AMFs 193, Session Management Functions (SMF) 194, and User Plane Functions (UPF) 195. AMF 192 may communicate with Unified Data Management (UDM) 196. AMF 192 may be a control node handling signaling between UE 104 and 5GC 190. Generally, AMF 192 provides QoS streaming and session management. (For example, user Internet Protocol (IP) packets from one or more UEs 104 may be delivered via UPF 195. UPF 195 may provide UE IP address allocation and other functions for one or more UEs. UPF 195 connects to IP services 197. IP services 197 may include the Internet, intranets, IP Multimedia Subsystem (IMS), PS streaming service, and / or other IP services.

[0041] A base station may also be referred to as a gNB, Node B, Evolved Node B (eNB), access point, transceiver base station, radio base station, radio transceiver, transceiver function, Basic Services Set (BSS), Extended Services Set (ESS), Transmit-Receive Point (TRP), or some other suitable terminology. Base station 102 provides UE 104 with access to EPC 160 or 5GC 190. Examples of UE 104 include cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, GPS devices, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablets, smart devices, wearable devices, vehicles, electricity meters, air pumps, large or small kitchen appliances, healthcare devices, implants, sensors / actuators, displays, or any other similarly functional device. Some UEs in UE 104 may be referred to as IoT devices (e.g., parking meters, air pumps, toasters, vehicles, heart monitors, etc.). IoT UEs may include Machine Type Communication (MTC) / Enhanced MTC (eMTC, also known as Category (CAT)-M or Cat M1) UEs, NB-IoT (also known as CAT NB1) UEs, and other types of UEs. In this disclosure, eMTC and NB-IoT may refer to future technologies that may evolve from or are based on these technologies. For example, eMTC may include FeMTC (Further eMTC), eFeMTC (Enhanced Further eMTC), mMTC (Massive MTC), etc., and NB-IoT may include eNB-IoT (Enhanced NB-IoT), FeNB-IoT (Further Enhanced NB-IoT), etc. UE 104 may also be referred to as a station, mobile station, subscriber station, mobile unit, subscriber unit, radio unit, remote unit, mobile device, radio device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, radio terminal, remote terminal, mobile phone, user agent, mobile client, client, or some other suitable term.

[0042] The deployment of communication systems (such as 5G New Radio (NR) systems) can involve a variety of components or parts. In a 5G NR system or network, network nodes, network entities, network mobility elements, radio access network (RAN) nodes, core network nodes, network elements or network equipment (such as base stations (BS, e.g., BS 102)), or one or more units (or components) performing base station functionality can be implemented in either a converged or decomposed architecture. For example, BSs (such as Node B (NB), evolved NB (eNB), NR BS, 5G NB, access point (AP), transmit / receive point (TRP), or cell, etc.) can be implemented as converged base stations (also known as standalone BS or monolithic BS) or decomposed base stations.

[0043] Aggregated base stations can be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node. Decentralized base stations can be configured to utilize a protocol stack that is physically or logically distributed across two or more units, such as one or more central or centralized units (CUs), one or more distributed units (DUs), or one or more radio units (RUs). In some aspects, the CU can be implemented within a RAN node, and one or more DUs can be co-located with the CU, or alternatively, can be geographically or virtually distributed across one or more other RAN nodes. DUs can be implemented to communicate with one or more RUs. Each of the CU, DU, and RU can also be implemented as a virtual unit, namely a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU).

[0044] Base station type operation or network design can take into account the aggregation characteristics of base station functionality. For example, decomposed base stations can be utilized in Integrated Access Backhaul (IAB) networks, Open Radio Access Networks (O-RAN (such as network configurations advocated by the O-RAN Alliance)), or Virtualized Radio Access Networks (vRAN, also known as Cloud Radio Access Networks (C-RAN)). Decomposition can include distributing functionality across two or more units in various physical locations, as well as virtually distributing the functionality of at least one unit, which enables flexibility in network design. The various units in a decomposed base station or decomposed RAN architecture can be configured for wired or wireless communication with at least one other unit.

[0045] In the example, the UE communication component 342 of UE 104 can reuse antennas for multi-CC operations, such as for transmitting uplink (or sidelink) communication or receiving downlink (or sidelink) communication. In some examples, certain reference signal-based communications may be affected by the use of additional antennas or different antenna configurations. Therefore, in some examples, according to the various aspects described herein, the BS communication component 442 (of base station 102 / gNB 180 or another UE in sidelink communication) can configure UE 104 using an indication of the number or configuration of antennas to be used (or UE 104 may choose to use when transmitting uplink communication or receiving downlink communication). In one example, the BS communication component 442 can configure UE 104 to use multiple antennas to receive CSI-RS from base station 102. In this example, the UE communication component 342 can receive this configuration accordingly and receive and / or measure CSI-RS through multiple antennas. In another example, BS communication component 442 can configure UE 104 using various SRS resources available to UE 104 for transmitting SRS with various antenna configurations. In this example, UE communication component 342 can receive the configuration accordingly and transmit SRS for various antenna configurations via the associated SRS resources.

[0046] Figure 2 A diagram illustrating an example of a decomposed base station 200 architecture is shown. The decomposed base station 200 architecture may include one or more central units (CUs) 210, which may communicate directly with the core network 220 via a backhaul link, or indirectly with the core network 220 via one or more decomposed base station units, such as a near real-time (near-RT) RAN Intelligent Controller (RIC) 225 via an E2 link, or a non-real-time (non-RT) RIC 215 associated with a Service Management and Orchestration (SMO) framework 205, or both. CUs 210 may communicate with one or more distributed units (DUs) 230 via corresponding midhaul links (such as F1 interfaces). DUs 230 may communicate with one or more radio units (RUs) 240 via corresponding fronthaul links. RUs 240 may communicate with a corresponding UE 104 via one or more radio frequency (RF) access links. In some implementations, UE 104 may be served simultaneously by multiple RUs 240.

[0047] Each unit in a cell (e.g., CU 210, DU 230, RU 240, and near-RT RIC 225, non-RT RIC 215, and SMO frame 205) may include or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via wired or wireless transmission media. Each unit in the cell, or an associated processor or controller providing instructions to the communication interfaces of these units, may be configured to communicate with one or more other units via transmission media. For example, these units may include wired interfaces configured to receive signals or transmit signals to one or more other units via wired transmission media. Additionally, these units may include wireless interfaces that may include receivers, transmitters, or transceivers (such as radio frequency (RF) transceivers) configured to receive signals or transmit signals to one or more other units via wireless transmission media, or both.

[0048] In some aspects, CU 210 can host one or more higher-level control functions. Such control functions may include Radio Resource Control (RRC), Packet Data Convergence Protocol (PDCP), Serving Data Adaptation Protocol (SDAP), etc. Each control function can be implemented using an interface configured to communicate signaling with other control functions hosted by CU 210. CU 210 can be configured to handle user plane functionality (i.e., Central Unit-User Plane (CU-UP)), control plane functionality (i.e., Central Unit-Control Plane (CU-CP)), or a combination thereof. In some specific implementations, CU 210 can be logically divided into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, CU-UP units can communicate bidirectionally with CU-CP units via an interface such as an E1 interface. CU 210 can be implemented to communicate with DU 230 for network control and signaling purposes, as needed.

[0049] DU 230 may correspond to a logic unit that includes one or more base station functions for controlling the operation of one or more RU 240s. In some aspects, DU 230 may, at least in part, host one or more of the following, depending on functional splits (such as those defined by the 3rd Generation Partnership Project (3GPP): Radio Link Control (RLC) layer, Medium Access Control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, etc.). In some aspects, DU 230 may also host one or more low PHY layers. Each layer (or module) may be implemented using an interface configured to communicate signals with other layers (and modules) hosted by DU 230 or with control functions hosted by CU 210.

[0050] Lower-layer functionality can be implemented by one or more RU 240s. In some deployments, an RU240 controlled by a DU 230 may correspond to a logical node that hosts RF processing functions or low-PHY layer functions (such as performing Fast Fourier Transform (FFT), Inverse FFT (iFFT), digital beamforming, Physical Random Access Channel (PRACH) extraction and filtering, or both, based at least in part on functional decomposition (such as lower-layer functional decomposition). In such architectures, the RU 240 may be implemented to handle over-the-air (OTA) communications with one or more UE 104s. In some specific implementations, the real-time and non-real-time aspects of control plane and user plane communications with the RU 240 may be controlled by the corresponding DU 230. In some scenarios, this configuration allows the DU 230 and CU 210 to be implemented in a cloud-based RAN architecture (such as a vRAN architecture).

[0051] SMO framework 205 can be configured to support RAN deployment and provisioning of both non-virtualized and virtualized network elements. For non-virtualized network elements, SMO framework 205 can be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which can be managed via operation and maintenance interfaces such as the O1 interface. For virtualized network elements, SMO framework 205 can be configured to interact with a cloud computing platform such as Open Cloud (O-Cloud) 290 to perform network element lifecycle management (such as instantiating virtualized network elements) via a cloud computing platform interface such as the O2 interface. Such virtualized network elements may include, but are not limited to, CU 210, DU 230, RU 240, and near-RT RIC 225. In some implementations, SMO framework 205 can communicate with the hardware aspects of the 4G RAN (such as Open eNB (O-eNB) 211) via the O1 interface. Additionally, in some implementations, SMO framework 205 can communicate directly with one or more RU 240s via the O1 interface. SMO framework 205 may also include a non-RT RIC 215 configured to support the functionality of SMO framework 205.

[0052] The non-RT RIC 215 can be configured to include logical functions that enable non-real-time control and optimization of RAN elements and resources, including AI / ML workflows for model training and updates, or policy-based guidance for applications / features in the near-RT RIC 225. The non-RT RIC 215 can be coupled to or communicate with the near-RT RIC 225 (e.g., via an A1 interface). The near-RT RIC 225 can be configured to include logical functions that enable near real-time control and optimization of RAN elements and resources via data collection and actions through an interface (e.g., via an E2 interface) connecting one or more CU 210s, one or more DU 230s, or both, and O-eNBs to the near-RT RIC 225.

[0053] In some implementations, to generate AI / ML models to be deployed in the near-RT RIC 225, the non-RT RIC 215 may receive parameters or external enrichment information from an external server. This information can be utilized by the near-RT RIC 225 and may be received from non-network data sources or network functions at the SMO framework 205 or the non-RT RIC 215. In some examples, the non-RT RIC 215 or the near-RT RIC 225 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 215 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions via the SMO framework 205 (such as reconfiguration via O1) or by creating RAN management policies (such as A1 policies).

[0054] Turn now Figures 3 to 11 The aspects are described with reference to one or more components and one or more methods that can perform the actions or operations described herein, wherein the aspects in dashed lines may be optional. Although the following will be discussed in detail... Figures 5 to 10 The operations described herein are presented in a specific order and / or are presented as being performed by example components; however, it should be understood that the order of actions and the components performing these actions may vary depending on the specific implementation. Furthermore, it should be understood that the actions, functions, and / or components described below may be performed by a specially programmed processor, a processor executing specially programmed software or a computer-readable medium, or any other combination of hardware and / or software components capable of performing the described actions or functions.

[0055] refer to Figure 3An example of a specific implementation of UE 104 may include various components, some of which have already been described above and are further described herein, including components such as one or more processors 312 and one or more memories 316 and one or more transceivers 302 communicating via one or more buses 344. For example, one or more processors 312 may include a single processor or multiple processors configured to perform one or more functions described herein. For example, multiple processors may be configured to perform a specific subset of the set of functions described herein, such that multiple processors can perform the set of functions together. Similarly, for example, one or more memories 316 may include a single memory device or multiple memory devices configured to store instructions or parameters for performing one or more functions described herein. For example, multiple memory devices may be configured to store instructions or parameters for performing a specific subset of the set of functions described herein, such that multiple memory devices can store instructions or parameters for the set of functions together. According to the aspects described herein, one or more processors 312, one or more memories 316, and one or more transceivers 302 may operate in conjunction with a modem 340 and / or UE communication component 342 for multi-CC operation reuse antennas.

[0056] In one aspect, one or more processors 312 may include modem 340 and / or may be part of modem 340 using one or more modem processors. Therefore, various functions associated with UE communication component 342 may be included in modem 340 and / or processor 312, and in one aspect, may be performed by a single processor, while in other aspects, different functions may be performed by a combination of two or more different processors. For example, in one aspect, one or more processors 312 may include any or any combination of a modem processor, or baseband processor, or digital signal processor, or transmit processor, or receiver processor, or transceiver processor associated with transceiver 302. In other aspects, some features of one or more processors 312 and / or modem 340 associated with UE communication component 342 may be performed by transceiver 302.

[0057] Additionally, the memory / multiple memories 316 may be configured to store data used herein and / or a local version of application 375, or one or more sub-components of UE communication component 342 and / or its sub-components executed by at least one processor 312. The memory / multiple memories 316 may include any type of computer-readable medium that can be used by a computer or at least one processor 312, such as random access memory (RAM), read-only memory (ROM), magnetic tape, magnetic disk, optical disk, volatile memory, non-volatile memory, and any combination thereof. In one aspect, for example, when UE 104 is operating at least one processor 312 to execute UE communication component 342 and / or one or more sub-components of its sub-components, the memory / multiple memories 316 may be a non-transitory computer-readable storage medium storing one or more computer-executable codes and / or associated data defining UE communication component 342 and / or one or more sub-components of its sub-components.

[0058] Transceiver 302 may include at least one receiver 306 and at least one transmitter 308. Receiver 306 may include hardware, firmware, and / or software code executable by a processor for receiving data, the code including instructions and stored in memory (e.g., a computer-readable medium). Receiver 306 may be, for example, a radio frequency (RF) receiver. In one aspect, receiver 306 may receive signals transmitted by at least one base station 102. Additionally, receiver 306 may process such received signals and may also obtain measurements of these signals, such as, but not limited to, Ec / Io, signal-to-noise ratio (SNR), reference signal received power (RSRP), received signal strength indicator (RSSI), etc. Transmitter 308 may include hardware, firmware, and / or software code executable by a processor for transmitting data, the code including instructions and stored in memory (e.g., a computer-readable medium). Suitable examples of transmitter 308 may include, but are not limited to, RF transmitters.

[0059] Furthermore, in one aspect, UE 104 may include an RF front-end 388 that can operate communicatively with one or more antennas 365 and transceiver 302 to receive and transmit radio transmissions, such as wireless communications transmitted by at least one base station 102 or wireless transmissions transmitted by UE 104. The RF front-end 388 may be connected to one or more antennas 365 and may include one or more low-noise amplifiers (LNAs) 390, one or more switches 392, one or more power amplifiers (PAs) 398, and one or more filters 396 for transmitting and receiving RF signals.

[0060] On one hand, the LNA 390 can amplify the received signal at the desired output level. On another hand, each LNA 390 can have a specified minimum gain value and a maximum gain value. On yet another hand, the RF front end 388 can use one or more switches 392 to select a particular LNA 390 and its specified gain value based on the desired gain value for a particular application.

[0061] Furthermore, for example, the RF front-end 388 may use one or more PAs 398 to amplify the signal for RF output at a desired output power level. In one aspect, each PA 398 may have a specified minimum gain value and a maximum gain value. In another aspect, the RF front-end 388 may use one or more switches 392 to select a particular PA 398 and its specified gain value based on the desired gain value for a particular application.

[0062] Additionally, for example, the RF front-end 388 may use one or more filters 396 to filter the received signal to obtain the input RF signal. Similarly, in one aspect, for example, a corresponding filter 396 may be used to filter the output from a corresponding PA 398 to generate an output signal for transmission. In one aspect, each filter 396 may be connected to a specific LNA 390 and / or PA 398. In one aspect, the RF front-end 388 may use one or more switches 392 to select the transmission path or reception path using a specified filter 396, LNA 390, and / or PA 398 based on a configuration as specified by the transceiver 302 and / or processor 312.

[0063] Therefore, transceiver 302 can be configured to transmit and receive wireless signals via RF front end 388 through one or more antennas 365. In one aspect, the transceiver can be tuned to operate at a specified frequency, enabling UE 104 to communicate with, for example, one or more base stations 102 or with one or more cells associated with one or more base stations 102. In another aspect, for example, modem 340 can configure transceiver 302 to operate at a specified frequency and power level based on UE configuration of UE 104 and communication protocols used by modem 340.

[0064] In one aspect, modem 340 may be a multi-band, multi-mode modem capable of processing digital data and communicating with transceiver 302, enabling the use of transceiver 302 to transmit and receive digital data. In another aspect, modem 340 may be multi-band and configured to support multiple frequency bands for a specific communication protocol. In another aspect, modem 340 may be multi-mode and configured to support multiple operating networks and communication protocols. In one aspect, modem 340 may control one or more components of UE 104 (e.g., RF front-end 388, transceiver 302) to transmit and / or receive signals from the network based on a specified modem configuration. In one aspect, the modem configuration may be based on the modem's mode and the frequency band used. In another aspect, the modem configuration may be based on UE configuration information associated with UE 104, such as information provided by the network during cell selection and / or cell reselection.

[0065] In one respect, according to the aspects described herein, the UE communication component 342 may optionally include: an antenna reuse component 352 for communicating in a second frequency band using an antenna assigned to a first frequency band; a CSI configuration processing component 354 for receiving and processing CSI configurations received from a base station (or another UE in sidelink communication); a CSI generation component 356 for generating CSIs for transmission to a base station based on the CSI configurations; and / or an SRS configuration processing component 358 for processing SRS configurations received from a network node to determine the resources through which to transmit SRS.

[0066] On one hand, processor 312 may correspond to a combination Figure 11 The UE describes one or more processors in the processor. Similarly, memory / multiple memories 316 may correspond to a combination of Figure 11 The UE describes one or more memories.

[0067] refer to Figure 4An example of a specific implementation of base station 102 (e.g., base station 102 and / or gNB 180, as described above) may include various components, some of which have already been described above, but also include components such as one or more processors 412 and one or more memories 416 communicating via one or more buses 444, and one or more transceivers 402. For example, one or more processors 412 may include a single processor or multiple processors configured to perform one or more functions described herein. For example, multiple processors may be configured to perform a specific subset of the set of functions described herein, such that multiple processors can perform the set of functions together. Similarly, for example, one or more memories 416 may include a single memory device or multiple memory devices configured to store instructions or parameters for performing one or more functions described herein. For example, multiple memory devices may be configured to store instructions or parameters for performing a specific subset of the set of functions described herein, such that multiple memory devices can store instructions or parameters for the set of functions together. Based on the aspects described herein, one or more processors 412, one or more memories 416, and one or more transceivers 402 may operate in conjunction with a modem 440 and / or BS communication component 442 for configuring a UE with a multi-CC operation reuse antenna.

[0068] Transceiver 402, receiver 406, transmitter 408, one or more processors 412, memory / multiple memories 416, application 475, bus 444, RF front end 488, LNA 490, switch 492, filter 496, PA 498 and one or more antennas 465 may be the same as or similar to the corresponding components of UE 104 as described above, but are configured or otherwise programmed for base station operation rather than UE operation.

[0069] In one respect, according to the aspects described herein, the BS communication component 442 may optionally include: an antenna configuration component 452 for configuring the UE 104 to perform wireless communication in a second frequency band using an antenna assigned to the first frequency band; a CSI configuration component 454 for configuring the UE 104 to measure and / or report measurements of CSI-RS received by the UE 104; a pre-decoding component 456 for selecting or generating a pre-decoder for transmitting downlink communication to the UE 104; and / or an SRS configuration component 458 for configuring the UE to transmit SRS through indicated resources.

[0070] On one hand, processor 412 may correspond to a combination Figure 11 The base station described in the text refers to one or more processors among the processors. Similarly, memory / multiple memories 416 may correspond to a combination of... Figure 11The base station in the text describes one or more memories.

[0071] Figure 5 A flowchart illustrating an example of a method 500 for reusing an antenna in multi-CC operation including CSI reporting, based on the aspects described herein. Figure 6 A flowchart illustrating an example of a method 600 for configuring a UE to reuse antennas in multi-CC operation including CSI reports, according to various aspects described herein. In the example, UE 104 can use Figure 1 and / or Figure 3 One or more of the components described in the document are used to perform the action. Figure 5 The functionality described in method 500 is illustrated. In the example, nodes that schedule UE 104 using communication resources (such as base station 102 or gNB 180, a monolithic base station or gNB, a portion of a split base station or gNB, a UE in sidelink communication, etc.) can use... Figure 1 and / or Figure 4 One or more of the components described are used to perform Figure 6 The functions described in method 600 are shown. For ease of explanation, methods 500 and 600 are described together; however, methods 500 and 600 do not need to be executed together and can actually be executed independently using separate devices.

[0072] In method 600, at block 602, a configuration for receiving downlink signaling in a first frequency band by a first antenna can be transmitted. In one aspect, antenna configuration component 452 (e.g., in conjunction with processor 412, memory / multiple memories 416, transceiver 402, BS communication component 442, etc.) can (e.g., for or to UE 104) transmit a configuration for receiving downlink signaling (e.g., from a network node) in the first frequency band by (e.g., of UE 104) a first antenna. For example, this configuration may include an RRC configuration that configures the antenna of UE 104 for communication in one or more frequency bands, such as operating at least the first antenna to receive downlink signaling from or send uplink signaling to a network node in the first frequency band, and operating at least the second antenna to receive downlink signaling from or send uplink signaling to a network node in a second frequency band. Frequency bands may be different CCs, or may include different CCs. In the example, antenna configuration component 452 can configure each CC for each antenna and can include a time slot configuration for each CC, wherein the time slot configuration can indicate for a given time slot or other time period whether the UE is to send uplink communication in a time slot (referred to as "U" time slot), or to receive downlink communication in a time slot (referred to as "D" time slot), or whether the time slot is used to switch from downlink to uplink (referred to as "S" time slot).

[0073] In method 500, at block 502, a configuration for receiving downlink signaling in a first frequency band by a first antenna can be received. In one aspect, UE communication component 342 (e.g., in conjunction with processor 312, memory / multiple memories 316, transceiver 302, etc.) can (e.g., from a network node) receive a configuration for receiving downlink signaling in the first frequency band (e.g., from a network node) by a first antenna (e.g., of UE 104). As described, this configuration may include an RRC configuration that configures the antenna of UE 104 for communication in one or more frequency bands, and UE 104 can receive this configuration and operate accordingly in one or more frequency bands (e.g., CC). For example, based on this configuration, UE 104 can operate the first antenna in antenna 365 to receive or transmit signals from a network node in the first frequency band, and can operate the second antenna in antenna 365 to receive or transmit signals from a network node in the second frequency band.

[0074] In method 600, at block 604, an indication may be sent for receiving downlink signaling in a second frequency band using the first antenna together with the second antenna during a time period. In one aspect, antenna configuration component 452 (e.g., in conjunction with processor 412, memory / multiple memories 416, transceiver 402, BS communication component 442, etc.) may (e.g., for or to UE 104) send an indication for receiving downlink signaling in a second frequency band using the first antenna together with the second antenna during a time period. For example, although the first antenna is initially configured to receive (or transmit) signaling in the first frequency band, antenna configuration component 452 may allow UE 104 to reuse the first antenna for (e.g., together with the second antenna) additionally receiving downlink signaling in the second frequency band. This allows UE 104 to achieve diversity gain or other signaling benefits by using multiple antennas. In addition, the antenna configuration component 452 can configure another antenna at UE 104 during a period in which the first antenna is not used on the first frequency band (e.g., when UE 104 is not scheduled for communication in the first frequency band during that period, such as when the time slot direction of the first frequency band is "U" but no uplink transmission is scheduled / configured, or when the time slot direction of the first frequency band is "D").

[0075] In method 500, at block 504, an instruction can be received for using the first antenna together with the second antenna to receive downlink signaling in the second frequency band during a time period. In one aspect, antenna reuse component 352 (e.g., in conjunction with processor 312, memory / multiple memories 316, transceiver 302, UE communication component 342, etc.) can (e.g., from a network node) receive an instruction for using the first antenna together with the second antenna to receive downlink signaling in the second frequency band during a time period. In this respect, antenna reuse component 352 can reuse the first antenna, which was not used during that time period, for receiving downlink signaling in the second frequency band together with the second antenna.

[0076] For example, antennas can be reused similarly for transmitting uplink communication. To reuse antennas for receiving downlink communication or transmitting uplink communication, antenna configuration component 452 can send indications in semi-static signaling (such as in RRC signaling and / or other signaling), and / or antenna reuse component 352 can receive indications in semi-static signaling (such as in RRC signaling and / or other signaling), which can have a conventional / configured pattern in time and frequency. In another example, antenna configuration component 452 can send indications in dynamic signaling (such as based on scheduling permission) (e.g., in downlink control information (DCI), medium access control (MAC)-control element (CE) or other dynamic signaling), and / or antenna reuse component 352 can receive indications in dynamic signaling (such as based on scheduling permission) (e.g., in downlink control information (DCI), medium access control (MAC)-control element (CE) or other dynamic signaling).

[0077] Furthermore, various mechanisms for using dynamic signaling to send or receive indications are possible. For example, antenna configuration component 452 may send indications on a per-grant basis (e.g., within a grant (such as a PDSCH or PUSCH grant) or otherwise), and / or antenna reuse component 352 may receive indications on a per-grant basis (e.g., within a grant (such as a PDSCH or PUSCH grant) or otherwise), allowing antenna switching / sharing to occur on a per-grant basis. In some examples, "per-grant basis" may include a grant indicating a one-shot antenna switch (e.g., within the duration of the grant). After the time period associated with the granted resource has elapsed, antenna reuse component 352 may switch the antenna back to a previous or default state (e.g., antenna reuse component 352 may switch the first antenna back to the first frequency band). In other examples, "per-grant basis" may include a grant indicating an antenna switch (e.g., a state switch) until another grant indicates another antenna switch (e.g., a state switch). In this example, the antenna reuse component 352 can maintain the antenna state (e.g., the first antenna assigned to the second frequency band) and not return to the previous or default antenna state unless or until it is instructed to do so (e.g., by receiving an associated instruction from the base station 102, which may be granted in a subsequent authorization).

[0078] In another example, antenna switching / sharing between frequency bands can be based on permission received during an observation period, where the observation period can be configured as or defined as a subset of time slots. In the example, in method 600, optionally at block 606, an observation period configuration for transmitting an antenna switching indication can be transmitted or received. In one aspect, antenna configuration component 452 (e.g., in conjunction with processor 412, memory / multiple memories 416, transceiver 402, BS communication component 442, etc.) can transmit or receive an observation period configuration for transmitting an antenna switching indication. In the example, in method 500, optionally at block 506, an observation period configuration for receiving an antenna switching indication can be received or transmitted. In one aspect, antenna reuse component 352 (e.g., in conjunction with processor 312, memory / multiple memories 316, transceiver 302, UE communication component 342, etc.) can receive or transmit an observation period configuration for receiving an antenna switching indication. For example, the observation period configuration can define an observation period as including a subset of time slots, such as a range based on the time slot index, an indication of the validity duration of the starting time slot and the time slot, an indication of the time slot periods that are part of the observation period and / or another time slot period that are not part of the observation period (or an indication of the total number of time slots), etc.

[0079] In this example, antenna configuration component 452 may send an indication in the grant, and / or antenna reuse component 352 may receive an indication in the grant. Based on this grant, antenna reuse component 352 can know the switching / sharing state of the antenna and can maintain this state for a certain period of time, which may include the remainder of the validity period corresponding to the observation period. For example, if the observation period is in a time slot where both CCs are in the "D" direction, and the grant signaling notification on the first band (e.g., CC 0) requires six receiving antennas, and the grant signaling notification on the second band (e.g., CC 1) requires two receiving antennas, then antenna reuse component 352 can maintain this state in other time slots within the observation period. Any subsequent grants can be considered valid if they are a subset that the current state can support; for example, a grant on CC 0 should not require more than six antennas for DL ​​reception or UL transmission, and / or a grant on CC 1 should not require more than two antennas for DL ​​reception or UL transmission. In the example, antenna configuration component 452 can ensure that permission follows the current antenna state during the validity period, and / or if permission received during the validity period does not follow the associated antenna switching / sharing state, antenna reuse component 352 can trigger an error (e.g., notify the network node of the error).

[0080] In yet another example, at a given time after receiving feedback for a PDSCH, antenna reuse component 352 can apply a received handover indication (e.g., an indication received at block 504 for switching the first antenna to the second frequency band) (e.g., the opposite of what is applied to a scheduled PDSCH). In yet another example, antenna reuse component 352 can apply the received handover indication based on feedback with an acknowledgment (ACK) value (e.g., hybrid automatic repeat / request (HARQ) feedback). For example, antenna reuse component 352 can apply the handover indication after HARQ feedback (or HARQ-ACK). X At the symbol or after HARQ feedback (or HARQ-ACK) X A switching instruction (e.g., switching the first antenna to the second band) is applied at the first time slot after the symbol (e.g., quantized to the time slot boundary). In the example, X It can be a fixed value, which can be based on the UE capabilities indicated by UE 104 to the network node, or X It can be configured for UE 104, etc. in the RRC configuration.

[0081] In the example, fields in the grant (e.g., fields in the DCI, such as a bit field) can be used to switch between different antenna switching / sharing states (e.g., if the value of the field remains unchanged across consecutive DCIs, then no switching occurs). For example, a bit field can correspond to two different antenna configurations, such as whether an antenna assigned to the first band will also be used for communication via the second band (or the band receiving the DCI). For example, as described, the DCI can be a grant that schedules downlink resources (e.g., a DCI with DL assignment) or a DCI without DL assignment. When the DCI does not have DL assignment, the UE communication component 342 can still transmit HARQ-ACK (however, some fields (such as Frequency Domain Resource Assignment (FDRA)) can have reserved values). In this example, the antenna reuse component 352 can receive fields in the DCI and can determine whether to apply antenna switching at the application time (e.g., using the first antenna assigned to the first band for communication in the second band), which can be based on HARQ feedback.

[0082] In the example, because a given frequency band or CC can be turned on or off based on antenna state switching, and because antenna state switching is defined on multiple CCs, the interpretation of DCI can also vary depending on the current state (before antenna switching). For example, if UE 104 is in the baseline state, a reference CC can be used to monitor indications in the DCI used for state switching (e.g., the DCI scheduled for CC 0) (e.g., at box 504), or any CC can be used to monitor the DCI used for state switching (either the DCI scheduled for CC 0 or the DCI scheduled for CC 1). For example, if UE 104 is in the antenna-shared state in CC 1, assuming the UE does not monitor the PDCCH on CC 0 in the current state, CC1 can be used to monitor the DCI used for state switching (e.g., the DCI scheduled for CC 1).

[0083] In the examples above, if an indication is sent at box 604 or received at box 504 according to the grant or schedule DCI description, the unscheduled DCI may alternatively be used to carry the indication. In some cases, HARQ-ACK feedback may also be used as a consideration of when and / or whether to apply the antenna switching indicated in the scheduled or unscheduled DCI. Furthermore, as described, UE 104 may be able to reuse the receive antenna, reuse the transmit antenna, or reuse both the transmit and receive antennas, as described above and further herein.

[0084] In method 500, at block 508, with antenna switching applied, a first antenna and a second antenna can be used during a time period to receive downlink signaling in a second frequency band. In one aspect, UE communication component 342 (e.g., in conjunction with processor 312, memory / multiple memories 316, transceiver 302, etc.) can use both the first and second antennas during the time period to receive downlink signaling in the second frequency band. As described above, in some examples, network nodes can benefit from CSI measurements from UE 104 based on using both the first and second antennas to facilitate pre-decoder determination or generation at the network node. For example, as described above, the maximum number of layers can change across time slots when receive antennas can be reused or borrowed across CC / bands, and / or the number of available receive antennas can change across time slots (even for the same number of layers). The UE can be configured to handle CSI calculations and reporting in NR with a maximum value for the reported rank variation by utilizing different CSI reporting configurations, but additional configurations or indications described herein can be used to capture variations in the number of receive antennas. Therefore, for example, a CSI report from UE 104 or a configuration for a CSI report may include the concept of the number of received antennas for measuring CSI-RS from network nodes.

[0085] For example, this information can be included in each reporting configuration or resource setting or resource. For each CSI reporting configuration, a number of ranks can be indicated for the report (e.g., rank limit), which may be sufficient to indicate the number of antennas used to receive CSI-RS from the network node. However, if the maximum rank of the report is configured according to the CSI resource, for example, for Network Energy Saving (NES), the number of receive antennas can be associated with each CSI resource individually. If UE 104 is configured with multiple receive antennas for CSI reporting, the UE can use the same / consistent set of receive antennas for CSI reporting. For example, a UE with up to eight receive antennas on CC can be configured to switch between a state with four receive antennas and another state with eight receive antennas. If the UE is configured to use four receive antennas for CSI reporting, the UE can use the same four receive antennas for CSI measurements. Measurements at multiple measurement times for CSI reporting may not come from different antenna sets for different time slots. This ensures that CSI reports are associated with the same antenna set, which allows the network node to generate a pre-decoder without needing to know which antennas UE 104 is using.

[0086] In method 600, optionally at block 608, a reference signal configuration indicating the number of antennas used to perform reference signal measurements can be transmitted. In one aspect, CSI configuration component 454 (e.g., in conjunction with processor 412, memory / multiple memories 416, transceiver 402, BS communication component 442, etc.) can (e.g., for or to UE 104) transmit the reference signal configuration indicating the number of antennas used to perform reference signal measurements. For example, CSI configuration component 454 can transmit this configuration as a CSI report configuration, CSI resource settings, or a CSI resource including the associated number of antennas, as described above and further described herein.

[0087] In method 500, optionally at block 510, a reference signal configuration indicating the number of antennas used to perform reference signal measurements may be received. In one aspect, CSI configuration processing component 354 (e.g., in conjunction with processor 312, memory / multiple memories 316, transceiver 302, UE communication component 342, etc.) may (e.g., from a network node) receive a reference signal configuration indicating the number of antennas used to perform reference signal measurements. For example, the reference signal configuration may be the number of antennas for CSI report configuration, CSI resource settings, or CSI resources, or it may indicate the number of antennas for CSI report configuration, CSI resource settings, or CSI resources.

[0088] In method 500, optionally at block 512, reference signal measurements of one or more reference signals in the second frequency band can be performed based on an indication or reference signal configuration. In one aspect, CSI generation component 356 (e.g., in conjunction with processor 312, memory / multiple memories 316, transceiver 302, UE communication component 342, etc.) can perform reference signal measurements of one or more reference signals in the second frequency band based on an indication or reference signal configuration. For example, CSI generation component 356 can perform reference signal measurements using an indicated antenna configuration (e.g., using a first antenna and a second antenna). In the example, CSI generation component 356 can determine the antenna configuration to be used when measuring the reference signal based on the number of antennas indicated in the reference signal configuration (and / or the same antenna configuration can be used for each number of antennas that can be indicated, so that the CSI is consistent for that number of antennas).

[0089] In method 500, optionally at block 514, reference signal measurements performed using multiple antennas can be transmitted. In one aspect, UE communication component 342 (e.g., in conjunction with processor 312, memory / multiple memories 316, transceiver 302, etc.) can (e.g., to a network node) transmit reference signal measurements performed using multiple antennas. For example, UE communication component 342 can transmit reference signal measurements in a resource assigned for CSI reporting. In the example, CSI generation component 356 can generate a CSI report indicating the receiving antenna used to measure the reported CSI-RS.

[0090] In method 600, optionally at block 610, reference signal measurements performed using multiple antennas can be received. In one aspect, BS communication component 442 (e.g., in conjunction with processor 412, memory / multiple memories 416, transceiver 402, etc.) can (e.g., from UE 104) receive reference signal measurements performed using multiple antennas. For example, BS communication component 442 can receive reference signal measurements in resources assigned for CSI reporting (e.g., in a CSI reporting configuration).

[0091] In method 600, optionally at block 612, a first antenna and a second antenna can be used to transmit downlink signaling in a second frequency band based on a pre-decoder associated with the UE. On one hand, a pre-decoder component 456 (e.g., in conjunction with processor 412, memory / multiple memories 416, transceiver 402, BS communication component 442, etc.) can use the first antenna and the second antenna to transmit downlink signaling in the second frequency band based on a pre-decoder associated with the UE. For example, the pre-decoder component 456 can generate a pre-decoder based on reference signal measurements received from UE 104, where UE 104 uses the same antenna configuration or number of antennas as assigned to receive downlink signaling. As described herein, this ensures that the pre-decoder is optimized for the antenna configuration used by UE 104 to receive downlink signaling when antenna reuse, borrowing, handover, etc., are enabled.

[0092] For both network nodes and UEs, the number and / or configuration of receive antennas used by the UE can facilitate alignment of DL link adaptation, CSI reporting, and granting. Various methods can be used to achieve this. In one example, where antenna switching / sharing is dynamic and can change with each grant, the network node can include or indicate the expected number of receive antennas for reception in the grant. In another example, as described above, the network node can indicate the expected number of receive antennas at the beginning of each valid period within the observation period.

[0093] For example, when an indication is sent at block 604, downlink permission may optionally be sent at block 614, the downlink permission including an indication and / or a second indication of the number of antennas used to measure CSI-RS for reporting CSI in the second frequency band or receiving downlink signaling. On one hand, CSI configuration component 454 (e.g., in conjunction with processor 412, memory / multiple memories 416, transceiver 402, BS communication component 442, etc.) may (e.g., to UE 104 in DCI) send downlink permission including an indication and / or a second indication of the number of antennas used to measure CSI-RS for reporting CSI in the second frequency band or receiving downlink signaling.

[0094] For example, when an indication is received at block 504, downlink permission may optionally be received at block 516, which includes an indication and / or a second indication of the number of antennas used to measure CSI-RS for reporting CSI in the second frequency band or for receiving downlink signaling. In one aspect, CSI configuration processing component 354 (e.g., in conjunction with processor 312, memory / multiple memories 316, transceiver 302, UE communication component 342, etc.) may (e.g., from a network node in the DCI) receive and / or process downlink permission, which includes an indication and / or a second indication of the number of antennas used to measure CSI-RS for reporting CSI in the second frequency band or for receiving downlink signaling. In the example, as described above, CSI generation component 356 may accordingly use that number of antennas (e.g., an antenna configuration including that number of antennas) when measuring CSI-RS received from the network node. In another example, as described above, the UE communication component 342 may accordingly use the number of antennas (e.g., an antenna configuration including that number of antennas) when receiving downlink signaling from a network node.

[0095] In the example, UE communication component 342 may be allowed a handover gap after receiving a PDCCH carrying a DCI indicating antenna switching, during which UE 104 may perform receive and / or transmit antenna switching. This can be a non-zero K0, where K0 is the gap between the end of the PDCCH and the beginning of the PDSCH. In the example, UE communication component 342 may report the supported or required gap size to the network node in UE capability signaling (e.g., in RRC signaling from UE 104 to the network node). In the example, when antenna switching information is received at the start of the validity period, there may be less handover gap overhead compared to when antenna switching information is received in the DCI during the validity duration of the observation period.

[0096] In yet another example, for channels configured in the DL and / or UL (e.g., Semi-Persistent Scheduling (SPS) and / or Configured Grant (CG)), the number of receive and / or transmit antennas can be included as part of the RRC configuration of the SPS and / or CG resources. In this example, antenna configuration component 452 can send an indication in the RRC signaling configuring the SPS or CG resources, and / or antenna reuse component 352 can receive an indication in the RRC signaling configuring the SPS or CG resources.

[0097] In another example, where antenna configuration component 452 can send indications in RRC signaling or other semi-static signaling, and / or antenna reuse component 352 can receive indications in RRC signaling or other semi-static signaling, the antenna configuration for some time slots of the cross-band CC can be based on a first style, while in other time slots it can be based on a second style. In this example, CSI reporting configuration can use a similar approach. For example, in a DL time slot with antenna reuse configured in the first style, CSI generation component 356 can measure CSI-RS using the same assumptions regarding the number of received antennas. Since PDSCH scheduling can also follow the time style mentioned above, network nodes can map CSI reports to corresponding time slots without ambiguity. For example, the number of received antennas used for CSI measurement and reporting can depend on the time style, such as the time slot index (making it unlikely to be explicitly and tightly related to CSI reporting configuration, CSI resource settings, or CSI resources). As mentioned above, this time style can be mapped to the received antenna reuse style. The time style can be configured for the UE, for example, via RRC signaling. In the example, the UE can be instructed to use this pattern for the purpose of CSI measurement with the assumption of alignment with network nodes, and also for averaging CSI over different time slots (e.g., as in the case of P-CSI, where the UE can perform averaging to prepare a report).

[0098] In these examples, in method 600, optionally at block 616, an indication of a time pattern can be sent in RRC signaling, which configures resources for downlink signaling. In one aspect, CSI configuration component 454 (e.g., in conjunction with processor 412, memory / multiple memories 416, transceiver 402, BS communication component 442, etc.) can send an indication of a time pattern in RRC signaling, which configures resources for downlink signaling. Furthermore, in these examples, in method 500, optionally at block 518, an indication of a time pattern can be received in RRC signaling, which configures resources for downlink signaling. In one aspect, CSI configuration processing component 354 (e.g., in conjunction with processor 312, memory / multiple memories 316, transceiver 302, UE communication component 342, etc.) can receive an indication of a time pattern in RRC signaling, which configures resources for downlink signaling.

[0099] In the above example, in method 500, optionally at block 520, the number of antennas used to measure CSI-RS for reporting CSI in the second frequency band can be determined based on a time pattern, to include at least the first antenna and the second antenna. On one hand, CSI generation component 356 (e.g., in conjunction with processor 312, memory / multiple memories 316, transceiver 302, UE communication component 342, etc.) can determine the number of antennas used to measure CSI-RS for reporting CSI in the second frequency band based on a time pattern, to include at least the first antenna and the second antenna. CSI generation component 356 can accordingly measure the CSI-RS received from the network node during the time period based on the time pattern and the number of antennas associated with the time pattern (e.g., configured for the time pattern).

[0100] Figure 7 A flowchart illustrating an example of a method 700 for reusing an antenna in a multi-CC operation including SRS transmission, according to the aspects described herein. Figure 8 A flowchart illustrating an example of a method 800 for configuring a UE to reuse antennas in multi-CC operation including SRS transmission, according to various aspects described herein. In the example, UE 104 can use Figure 1 and / or Figure 3 One or more of the components described in the document are used to perform the action. Figure 7 The functionality described in method 700 is illustrated. In the example, nodes that schedule UE 104 using communication resources (such as base station 102 or gNB 180, a monolithic base station or gNB, a portion of a split base station or gNB, a UE in sidelink communication, etc.) can use... Figure 1 and / or Figure 4One or more of the components described are used to perform Figure 8 The functions described in method 800 are shown. For ease of explanation, methods 700 and 800 are described together; however, methods 700 and 800 do not need to be executed together and can actually be executed independently using separate devices.

[0101] In method 800, at block 802, one or more configurations may be transmitted indicating resources for transmitting SRS in a first frequency band using each of a plurality of combinations of multiple antennas, wherein at least one of the multiple combinations is based on switching one or more antennas of the plurality of antennas configured for a second frequency band to the first frequency band. On one hand, antenna configuration component 452 (e.g., in conjunction with processor 412, memory / multiple memories 416, transceiver 402, BS communication component 442, etc.) may (e.g., for or to UE 104) transmit one or more configurations indicating resources for transmitting SRS in a first frequency band using each of a plurality of combinations of multiple antennas, wherein at least one of the multiple combinations is based on switching one or more antennas of the plurality of antennas configured for a second frequency band to the first frequency band. For example, the one or more configurations may include an SRS configuration indicating one or more combinations of multiple antennas through which SRS is transmitted. This can allow a network node to receive SRS and determine the SRS Resource Indicator (SRI) to use when receiving uplink communication from UE 104, or to determine the pre-decoder to use when transmitting downlink communication to UE 104. In the example, the one or more configurations may include a single configuration indicating multiple combinations of antennas that UE 104 can use to transmit SRS, or the one or more configurations may include a configuration for each combination of antennas that UE 104 can use to transmit SRS, etc. For example, antenna configuration component 452 may send one or more configurations to UE 104 in RRC or other semi-static signaling.

[0102] In method 700, at block 702, one or more configurations may be received indicating resources for transmitting SRS to a network node in a first frequency band using each of a plurality of combinations of multiple antennas, wherein at least one of the multiple combinations is based on switching one or more antennas of the plurality of antennas configured for a second frequency band to the first frequency band. In one aspect, UE communication component 342 (e.g., in conjunction with processor 312, memory / multiple memories 316, transceiver 302, etc.) may (e.g., from a network entity) receive one or more configurations indicating resources for transmitting SRS to a network node in a first frequency band, wherein at least one of the multiple combinations is based on switching one or more antennas of the plurality of antennas configured for a second frequency band to the first frequency band. For example, the one or more configurations may include an SRS configuration indicating one or more combinations of multiple antennas through which SRS is transmitted to a network node. As described, for example, the one or more configurations may include a single configuration indicating multiple combinations of antennas that UE 104 can use to transmit SRS, or the one or more configurations may include a configuration for each combination of antennas that UE 104 can use to transmit SRS, etc. For example, UE communication component 342 can receive SRS configuration from network nodes in RRC or other semi-static signaling.

[0103] In method 700, optionally at block 704, SRS can be transmitted to the network node in the first frequency band using at least one of a plurality of combinations based on switching one or more antennas configured for the second frequency band to be used in the first frequency band. In one aspect, UE communication component 342 (e.g., in conjunction with processor 312, memory / multiple memories 316, transceiver 302, etc.) can transmit SRS to the network node in the first frequency band using at least one of a plurality of combinations of antennas based on switching one or more antennas configured for the second frequency band to be used in the first frequency band. For example, based on at least one of a plurality of combinations indicated in one or more configurations, at least one antenna (which may correspond to an SRS port, SRS resource set, or SRS set in the SRS configuration for the second frequency band) can be reused in the first frequency band for transmitting SRS in the first frequency band. For example, an SRS port may be associated with individual antennas and / or various combinations of antennas indicated in the configuration, which may include antennas configured for a first frequency band and / or a second frequency band (e.g., where antenna sharing across CCs is supported). In one example, UE communication component 342 may indicate to the network node the number of antennas or which antennas are configured for the second frequency band, and may generate one or more configurations based at least in part on this information. In another example, as further described herein, the network node may indicate to UE 104 the number of antennas and / or which antennas are used to transmit SRS in the first frequency band.

[0104] In method 700, optionally at block 706, during a time period, uplink communication can be transmitted to or downlink communication can be received from the network node using at least one of a plurality of combinations in a first frequency band or based on the remaining antennas among the plurality of antennas in a second frequency band. In one aspect, UE communication component 342 (e.g., in conjunction with processor 312, memory / multiple memories 316, transceiver 302, etc.) can, during a time period, transmit uplink communication to or receive downlink communication from the network node using at least one of a plurality of combinations of a plurality of antennas in a first frequency band or based on the remaining antennas among the plurality of antennas in a second frequency band. In this example, as further described herein, the network node can be instructed to reuse antennas in the first frequency band and / or maintain antennas in the second frequency band, so that the network node can generate an appropriate pre-decoder for downlink transmission or select an appropriate SRI for receiving uplink transmission in the associated frequency band. In one example, UE communication component 342 may indicate to the network node the number of antennas or which antennas are used to transmit uplink communication and / or receive downlink communication in a first frequency band (or second frequency band) during a time period. In another example, as further described herein, the network node may indicate to UE 104 the number of antennas and / or which antennas are used to transmit uplink communication and / or receive downlink communication in a first frequency band (or second frequency band) during a time period.

[0105] In method 800, optionally at block 804, SRS can be received from the UE in a first frequency band, wherein the SRS is based on at least one of a plurality of combinations. In one aspect, BS communication component 442 (e.g., in conjunction with processor 412, memory / multiple memories 416, transceiver 402, etc.) can receive SRS from the UE in the first frequency band, wherein the SRS is based on at least one of a plurality of combinations of antennas. For example, the UE can reuse at least one of the plurality of antennas (which may correspond to an SRS port, SRS resource set, or SRS set in an SRS configuration for a second frequency band) for use in the first frequency band for transmitting SRS in the first frequency band, based on one or more configurations.

[0106] In method 800, optionally at block 806, during a time period, uplink communication can be received from the UE or downlink communication can be sent to the UE based on at least one of a plurality of combinations in a first frequency band or based on the remaining antennas of a plurality of antennas in a second frequency band. In one aspect, the BS communication component 442 (e.g., in conjunction with processor 412, memory / multiple memories 416, transceiver 402, etc.) can receive uplink communication from the UE or send downlink communication to the UE during the time period, based on at least one of a plurality of combinations of multiple antennas in a first frequency band or based on the remaining antennas of a plurality of antennas in a second frequency band. For example, the UE can maintain at least another antenna of a plurality of antennas in the second frequency band, the at least another antenna corresponding to an SRS port, SRS resource set, or SRS collection in an SRS configuration. In this example, as further described herein, the antennas reused in the first frequency band and / or maintained in the second frequency band may be known to the network node based on an indication for transmitting SRS, or may be indicated to the network node by the UE 104, so that the network node can generate an appropriate pre-decoder or SRI for communication transmitted or received via the first and / or second frequency bands. In this example, receiving uplink communication from the UE or transmitting downlink communication to the UE may include generating the pre-decoder or SRI based on an SRS port, SRS resource set, or SRS set associated with at least one of the multiple antennas maintained in the second frequency band.

[0107] Indicating the possible combinations of antennas that can be used in a given frequency band helps ensure that UE 104 uses one of the combinations of antennas used by UE 104 to transmit SRS. This allows network nodes to select the appropriate SRI for receiving uplink communication from UE 104 that is transmitting uplink communication using the same antenna combination, or to select the appropriate pre-decoder for transmitting downlink communication to UE 104 that is receiving downlink communication using the same antenna combination. For example, transmit and / or receive antenna reuse performed by the UE (e.g., by antenna reuse component 352) can follow a pattern that allows network nodes to know which SRS ports are kept on the same CC and can be used for PDSCH transmission. This may apply to various usage indications for the SRS resource set (including "Use=Antenna Switching", "Use=NCB", "Use=CB", etc.), as indicated in the configuration.

[0108] For example, when reusing a UL antenna from one CC for downlink reception or uplink transmission on another CC, and when using an SRS resource set configured for antenna switching or NCB or CB, the SRS port held on the CC can be known to the network, or the network can be instructed to hold the SRS port on the CC. In this example, UL antenna reuse can be closely associated with SRS ports or SRS resources or SRS sets (e.g., as indicated in the configuration). In one example, antenna reuse component 352 can reuse antennas from a first frequency band to a second frequency band, and / or vice versa, based on one or more defined rules. In one example, the rules can be semi-static, such as rules for a UE supporting four-port SRS where ports 1 and 2 will remain on the source CC, while ports 3 and 4 can be borrowed by the target CC. In another example, the rules or associated indications can be in the DCI or based on a semi-static style. Alternatively or additionally, the antenna reuse component 352 of UE 104 may (e.g., in UE capabilities in RRC signaling, in uplink control information (UCI), or otherwise) indicate its preference for antennas associated with which SRS to maintain and which SRS to share with other CCs. Furthermore, for example, when scheduling PUSCH, network nodes may similarly need to know which ports are available for UL transmission.

[0109] Therefore, in one example, in method 800, optionally at block 808, an indication may be sent to the UE of at least one combination of multiple combinations for transmitting SRS or transmitting uplink communication or receiving downlink communication, or at least one configuration for transmitting SRS or transmitting uplink communication or receiving downlink communication. In one aspect, antenna configuration component 452 (e.g., in conjunction with processor 412, memory / multiple memories 416, transceiver 402, BS communication component 442, etc.) may send an indication to the UE of at least one combination of multiple combinations for transmitting SRS or at least one configuration for transmitting SRS. As described, for example, where one or more configurations include a single configuration indicating multiple combinations of antennas, the indication may indicate at least one combination of multiple combinations for transmitting SRS or transmitting uplink communication or receiving downlink communication. In another example, where one or more configurations include configurations for each combination, the indication may indicate a configuration for transmitting SRS (and / or subsequently transmitting uplink communication or receiving downlink communication). For example, antenna configuration component 452 may send an indication to UE 104 in DCI signaling or in other dynamic signaling (e.g., MAC-CE) to indicate which of several combinations or configurations should be used to transmit SRS. In the example, antenna configuration component 452 may send an indication for the purpose of the SRS, such as NCB-PUSCH, SRS for antenna switching, etc., and antenna configuration component 452 may determine, based on the purpose of the indication, which combination of several combinations is expected to be used by UE 104 to transmit SRS, transmit uplink communication, or receive downlink communication.

[0110] In the example, in method 700, optionally at block 708, an indication can be received from the network node of at least one combination of multiple combinations for transmitting SRS or transmitting uplink communication or receiving downlink communication, or at least one configuration for transmitting SRS or transmitting uplink communication or receiving downlink communication. In one aspect, antenna reuse component 352 (e.g., in conjunction with processor 312, memory / multiple memories 316, transceiver 302, UE communication component 342, etc.) can receive from the network node an indication of at least one combination of multiple combinations for transmitting SRS or transmitting uplink communication or receiving downlink communication, or at least one configuration for transmitting SRS or transmitting uplink communication or receiving downlink communication. In the example, as described herein, antenna reuse component 352 can accordingly reuse at least one antenna from a second frequency band to a first frequency band for transmitting SRS based on the indicated combination or configuration. In the example, the indication may include the purpose of the indication for SRS, such as NCB-PUSCH, SRS for antenna switching, etc., and the antenna reuse component 352 may determine, based on the purpose of the indication, which of the multiple combinations to use when transmitting SRS or transmitting uplink communication or receiving downlink communication.

[0111] In another example, in method 700, optionally at block 712, at least one combination of multiple combinations can be selected for transmitting SRS. In one aspect, antenna reuse component 352 (e.g., in conjunction with processor 312, memory / multiple memories 316, transceiver 302, UE communication component 342, etc.) can select at least one combination of multiple combinations for transmitting SRS. For example, antenna reuse component 352 can select at least one combination of multiple combinations based on rules (e.g., rules defined in wireless communication technology specifications such as 5G NR), as described further in detail herein.

[0112] As described above, a UE can be configured using an SRS resource set, which has multiple resources per frequency band to allow SRS transmission based on the number of transmit antennas and the number of receive antennas (e.g., xTyR). For example, for a UE supporting 1T2R in both frequency band B1 and frequency band B2, the UE can be configured using an SRS resource set with two resources in TDM for each frequency band—one resource per port. However, for UE 104, which supports antenna reuse, when using antenna reuse to implement antenna switching based on the corresponding pre-decoder generated by the antenna being used, UE 104 can be configured using additional resources for each possible combination of antennas.

[0113] For example, UE 104 may support transmit antenna sharing, receive antenna sharing, or both across B1 and B2. If it supports receive antenna sharing, enabling it to use 1T4R, SRS resources for 1T4R can be configured. If it supports transmit antenna sharing, enabling it to use 2T2R, SRS resources for 2T2R can be configured. If it supports both transmit and receive antenna sharing, enabling it to use 2T4R, SRS resources for 2T4R can be configured. In the example, configuration sent by SRS configuration component 458 (e.g., at block 802) and / or received by UE communication component 342 (e.g., at block 702) may include per-band SRS resources for one or more frequency bands for each combination of antennas supported by UE 104 (e.g., using antenna sharing or otherwise).

[0114] In one example, UE 104 may send UE capability information to the network node (e.g., in RRC signaling), which may indicate frequency bands that support antenna reuse, the possible combinations or number of antennas used for such frequency bands when antenna reuse is supported, etc. In the example, for a given frequency band combination (e.g., B1-B2), UE 104 may report xTyR separately for each frequency band. For these frequency band pairs, UE 104 may indicate whether it supports receive antenna switching, transmit antenna switching, or both, and / or which x'Ty'R combination it supports (e.g., capability signaling may be on each frequency band pair in the frequency band combination, as described above). If there are more than two frequency bands in which the UE can perform transmit and / or receive antenna switching, the frequency band pairs that can be reported for each frequency band combination, the three frequency bands for each frequency band combination, etc., are reported.

[0115] In the example, in method 700, optionally at block 710, a report may be sent indicating the number of configurable transmit antennas and receive antennas for each of the first and second frequency bands, and indicating whether receive antenna switching, transmit antenna switching, or both are supported for the band pairs of the first and second frequency bands. On one hand, antenna reuse component 352 (e.g., in conjunction with processor 312, memory / multiple memories 316, transceiver 302, UE communication component 342, etc.) may (e.g., to a network node) send a report indicating the number of configurable transmit antennas and receive antennas for each of the first and second frequency bands, and indicating whether receive antenna switching, transmit antenna switching, or both are supported for the band pairs of the first and second frequency bands. For example, as described above, antenna reuse component 352 may send a report in UE capability information to enable a network node to determine an SRS resource set having various possible combinations of SRS resources for antennas in one or more frequency bands.

[0116] In the example, in method 800, optionally at block 810, a report can be received indicating the number of configurable transmit antennas and receive antennas for each of the first and second frequency bands, and indicating whether receive antenna switching, transmit antenna switching, or both are supported for the band pairs of the first and second frequency bands. On one hand, SRS configuration component 458 (e.g., in conjunction with processor 412, memory / multiple memories 416, transceiver 402, BS communication component 442, etc.) can (e.g., for UE 104) receive a report indicating the number of configurable transmit antennas and receive antennas for each of the first and second frequency bands, and indicating whether receive antenna switching, transmit antenna switching, or both are supported for the band pairs of the first and second frequency bands. For example, as described above, SRS configuration component 458 can receive the report in UE capability information and can use the UE capability information to generate a configuration for transmitting SRS (e.g., as transmitted at block 802 and / or received at block 704).

[0117] In the example, UE 104 can be configured with multiple SRS configurations on a given CC at different timeslots, supporting one SRS configuration per xTyR. In this example, transmitting configuration at block 802 and / or receiving configuration at block 704 can include: SRS configuration component 458 transmitting multiple SRS configurations, and / or UE communication component 342 receiving multiple SRS configurations. In some cases, these SRS configurations can be separate and independent of each other, or they can be combined in a single configuration. In the example, there can be a configuration that covers different xTyR cases, and the UE can transmit SRS based on that single configuration. In the example, the UE can use a subset of configurations when transmitting SRS, depending on the xTyR configured for that timeslot. For example, if UE 104 can support 1T2R as a baseline and can support 2T4R when reusing transmit and / or receive antennas, then UE 104 can be configured using the resources used for transmitting SRS for 2T4R. However, when some antennas are used by another CC / band, only a subset of resources and / or SRS ports can be used (e.g., using port 0 from the first SRS resource and port 2 from the second SRS resource). In one example, the selection of ports and / or corresponding resources can be specified or otherwise indicated (e.g., dynamically or semi-statically) between the UE and the network node (e.g., in UCI signaling from UE 104 to the network node, in DCI signaling from the network node to UE 104, etc.).

[0118] In another example, the selection of ports and / or resources can be specified based on rules (e.g., rules defined in wireless communication technology specifications such as 5G NR). Examples of such rules could include, when the UE uses a 1T2R baseline and 2T4R and borrows both receive and transmit antennas, the antenna reuse component 352 can use the receive and / or transmit antennas associated with the first half of the SRS port from each SRS resource (e.g., port 0 from the first SRS resource and port 0 from the second SRS resource) to transmit SRS when switching to the baseline, in the case where the UE uses a 1T2R baseline and 1T4R and borrows only the receive antenna, the antenna reuse component 352 can use the receive antenna associated with the SRS port of the first half of the SRS resource to transmit SRS when switching to the baseline (e.g., using the two SRS resources with lower IDs out of four SRS resources; or using the SRS resource set with lower IDs if the four SRS resources belong to two SRS resource sets). In such examples, if UE 104 degrades resources (e.g., uses a subset of configured resources), UE communication component 342 can either maintain the per-port power at the root configuration or adapt it based on actual transmissions. For example, if UE 104 is configured using 2T4R and transmits SRS based on 2T4R, UE communication component 342 can split the power across two ports in each symbol. When using the same configuration for 1T2R, the power can be based on the split power, or the power per port can be increased by 3 dB (e.g., because only one port is probed per symbol). In this example, the power splitting behavior can be configured to UE 104 based on the configuration sent to UE 104 by the network node.

[0119] In other examples, in addition to PDSCH / PUSCH services, UE 104 can also perform L1 / L3 measurements for serving / neighboring cells based on multiple receive antennas. The aspects described herein can be similarly applied to such measurements. For example, for RSRP measurements on the serving cell, UE 104 and the network node can have a consistent understanding of the number of receive antennas used for measurement purposes (e.g., based on the number of receive antennas assigned by the network node in one or more indications (such as an indication sent in box 604 or a DCI sent in box 808), the number of receive antennas indicated by the UE, etc.). Additionally, in some examples, the network node can specify thresholds for Radio Link Monitoring (RLM), Beam Failure Recovery (BFR), Radio Resource Measurement (RRM), etc., based on a fixed set of (primary) receive antennas, which can be indicated in a configuration (such as an RRC configuration or other semi-static configuration). Alternatively, the UE communication component 342 can average RSRP measurements across “active” receive antennas, wherein the number of active receive antennas can change with antenna switching (e.g., based on an indication received from the network node at block 504, or an indication for transmitting uplink or receiving downlink communication as otherwise determined by the UE, as described herein). For example, for measurements of neighboring cells, the neighboring cells can indicate whether antenna sharing is supported (e.g., in system information (SI)). In this example, the UE communication component 342 can receive and decode the SI to determine whether antenna sharing is supported, and can accordingly use the associated set of receive antennas to measure L1 / L3 signals. In other words, for example, an indication from the network node can be used to determine the set of “active” receive antennas applicable to L1 / L3 measurements.

[0120] Figure 9 A flowchart illustrating an example of a method 900 for a UE to prioritize communications in which different numbers of antennas are configured, according to the aspects described herein. Figure 10 A flowchart illustrating an example of a method 1000 for prioritizing communications in which different numbers of antennas are configured, according to various aspects described herein. In the example, UE 104 can use... Figure 1 and / or Figure 3 One or more of the components described in the document are used to perform the action. Figure 9 The functionality described in method 900 is illustrated. In the example, nodes that utilize communication resources to schedule UE 104 (such as base station 102 or gNB 180, a monolithic base station or gNB, a portion of a split base station or gNB, a UE in sidelink communication, etc.) can use... Figure 1 and / or Figure 4 One or more of the components described are used to perform Figure 10The functions described in method 1000 are shown. For ease of explanation, methods 900 and 1000 are described together; however, methods 900 and 1000 do not need to be executed together and can actually be executed independently using separate devices.

[0121] In method 1000, at block 1002, a configuration indicating SPS or CG resources for a first communication in a first frequency band during a time period can be transmitted. In one aspect, the BS communication component 442 (e.g., in conjunction with processor 412, memory / multiple memories 416, transceiver 402, etc.) can transmit a configuration indicating SPS or CG resources for the first communication in a first frequency band during a time period. For example, the BS communication component 442 can transmit the configuration as an SPS configuration, or it can grant configuration parameters indicating SPS resources (in frequency and / or time) for use by UE 104 when receiving downlink communication from a network node (e.g., PDCCH or PDSCH). In another example, the BS communication component 442 can transmit the configuration as a CG configuration, or it can grant configuration parameters indicating CG resources (in frequency and / or time) for use by UE 104 when transmitting uplink communication to a network node (e.g., PUCCH or PUSCH). In the example, BS communication component 442 can send a configuration in semi-static (e.g., RRC) signaling, and one or more of the configured SPS or CG resources can later be activated using dynamic signaling permission (e.g., DCI). In the example, antenna configuration component 452 can also configure for UE 104 at least a portion of the multiple antennas to be used for communication using SPS or CG resources (e.g., as indicated in the configuration at box 1002 or otherwise received in activated DCI).

[0122] In method 900, at block 902, a configuration indicating SPS or CG resources for a first communication in a first frequency band during a time period can be received. In one aspect, UE communication component 342 (e.g., in conjunction with processor 312, memory / multiple memories 316, transceiver 302, etc.) can receive the configuration indicating SPS or CG resources for the first communication in a first frequency band during a time period. For example, UE communication component 342 can receive the configuration as an SPS configuration, or can grant configuration parameters indicating SPS resources (in frequency and / or time) for UE 104 to use when receiving downlink communication from a network node (e.g., PDCCH or PDSCH). In another example, UE communication component 342 can receive the configuration as a CG configuration, or can grant configuration parameters indicating CG resources (in frequency and / or time) for UE 104 to use when sending uplink communication to a network node (e.g., PUCCH or PUSCH). In the example, UE communication component 342 can receive configuration in semi-static (e.g., RRC) signaling and can later receive activation commands for one or more of the configured SPS or CG resources in dynamic signaling grant (e.g., DCI).

[0123] In method 1000, at block 1004, an instruction may be sent to perform antenna switching of at least a portion of multiple antennas from a first frequency band to a second frequency band to perform a second communication during a time period. In one aspect, antenna configuration component 452 (e.g., in conjunction with processor 412, memory / multiple memories 416, transceiver 402, BS communication component 442, etc.) may send an instruction to perform antenna switching of at least a portion of multiple antennas from a first frequency band to a second frequency band to perform a second communication during a time period. For example, antenna configuration component 452 may send an instruction in dynamic signaling (such as in DCI as described above) to perform antenna switching for the various purposes described herein.

[0124] In method 900, at block 904, an instruction may be received to perform antenna switching of at least a portion of multiple antennas from a first frequency band to a second frequency band for performing second communication within a time period. In one aspect, antenna reuse component 352 (e.g., in conjunction with processor 312, memory / multiple memories 316, transceiver 302, UE communication component 342, etc.) may receive an instruction to perform antenna switching of at least a portion of multiple antennas from a first frequency band to a second frequency band for performing second communication within a time period. For example, antenna reuse component 352 may receive an instruction in dynamic signaling (such as in DCI as described above) to perform antenna switching for the various purposes described herein. However, since SPS or CG resources have previously been configured for that time period, this may cause a conflict where one or more antennas configured for first communication via SPS or CG resources are now switched to the second frequency band for second communication within the same time period.

[0125] In some examples, there may be a conflict between the expected number of transmit or receive antennas to be used by UE 104. For example, UE communication component 342 may receive a CG-PUSCH configuring four transmit antennas for dual-port transmission on CC 0 and a dynamic grant instructing the UE to use six receive antennas to receive downlink communication on CC 1, but UE 104 may only have eight antennas. As an example, the UE has only eight antennas. In one example, it may not be expected that the UE is in such a scheduling scenario. In the example, antenna reuse component 352 may treat this scenario as an error event (e.g., receiving an indication at box 904 may be considered an error event). In this regard, for example, antenna reuse component 352 may ignore the indication and / or may output an error notification (e.g., output to a log file in memory / multiple memories 316, in communication to network nodes, etc.).

[0126] In method 900, at block 906, at least one of the first communication or the second communication can be performed based on a priority ordering rule. In one aspect, the UE communication component 342 (e.g., in conjunction with processor 312, memory / multiple memories 316, transceiver 302, etc.) can perform at least one of the first communication or the second communication based on a priority ordering rule. For example, the UE communication component 342 can employ a priority ordering rule when antenna switching conflicts with the first communication via SPS or CG resources. For example, the priority ordering rule can instruct the dropping of one or more channels or the prioritization of one or more channels. For example, in the case where the indication received at block 904 is a DCI instructing the use of an antenna borrowed from the first frequency band to perform (e.g., transmit or receive) the second communication via its resources, the priority ordering rule can specify that dynamic granting (e.g., a DCI indication for the second communication) takes precedence over SPS or CG granting (e.g., over the first communication), and thus in this example, the antenna reuse component 352 can reuse the antenna from the first frequency band to the second frequency band and perform the second communication. In another example, priority ordering rules can instruct priority ordering for specific types of channels (e.g., prioritizing PDCCH over PUSCH), priority ordering for specific cell indices (e.g., specific cell indices of cells associated with a first or second frequency band), etc. In any case, such as when the UE communication component 342 needs to prioritize communications based on priority ordering rules, the UE communication component 342 can execute prioritized communications and cancel non-priority communications within that time period.

[0127] For example, when determining which antennas to use for a given frequency band, the antenna reuse component 352 can use a priority ordering rule, which may cause the antenna reuse component 352 to treat some channels as discarded. In an example where the UE communication component 342 can receive dynamic grants for dual-port transmission of a CG-PUSCH configured with four transmit antennas on CC 0 and instructing the UE to use six receive antennas to receive downlink communication on CC 1, the priority ordering rule may indicate that dynamic grants are preferred over configured grants, and the antenna reuse component 352 may discard the CG-PUSCH on CC 0. In another example, the priority ordering rule may indicate prioritizing grants based on serving cell index (e.g., prioritizing grants for lower serving cell indexes), based on channel type (e.g., prioritizing downlink or uplink, prioritizing dynamically scheduled PDSCH or SPS PDSCH or CG-PUSCH or PUCCH, etc.), based on the content carried by the channel (e.g., whether the PUSCH has a UCI, or what type of UCI the PUSCH is transmitting, etc.). Rules can be configured in UE 104 based on wireless communication technology standards (e.g., 5G NR), configured via configuration from network nodes, or other signaling.

[0128] Therefore, in some examples, network nodes can similarly perform communication based on the same priority ordering rule. In method 1000, at block 1006, at least one of the first or second communication can be performed based on the priority ordering rule. In one aspect, the BS communication component 442 (e.g., in conjunction with processor 412, memory / multiple memories 416, transceiver 402, etc.) can perform at least one of the first or second communication based on the priority ordering rule. For example, the BS communication component 442 can employ the priority ordering rule to determine when antenna switching conflicts with the first communication via SPS or CG resources at UE 104, and can accordingly perform the first and / or second communication with UE 104.

[0129] In one example, when communication is performed based on a priority ordering rule at block 906, alternatively at block 908, the second communication may be prioritized at least partially based on degrading the first communication to use fewer antennas. In one aspect, antenna reuse component 352 (e.g., in conjunction with processor 312, memory / multiple memories 316, transceiver 302, UE communication component 342, etc.) may prioritize the second communication at least partially based on degrading the first communication to use fewer antennas. For example, the UE may perform priority ordering and, instead of discarding, degrade the number of transmit and / or receive antennas. For example, if CG is initially configured to have two transmit antennas and two layers in CC 0, but based on permission, antenna reuse component 352 shares some antennas with CC 1, resulting in CC 0 having one transmit antenna and one layer, then UE communication component 342 may use a single transmit antenna and a single layer to transmit in CC 0. This degradation of transmit and / or receive antennas, the permitted conditions, and the timing patterns (if such patterns exist) may be aligned between the UE and the gNB. Therefore, for example, a network node may signal to UE 104 the downgrade (or related parameters), permitted conditions and / or timing patterns (e.g., in dynamic or semi-static signaling), or the UE may request the downgrade (or related parameters), permitted conditions and / or timing patterns in advance.

[0130] Therefore, in some examples, network nodes can similarly prioritize second communications by degrading first communications. In method 1000, optionally at block 1008, the prioritization of second communications can be based at least in part on degrading the first communication to use a smaller number of antennas. In one aspect, as described above, the BS communication component 442 (e.g., in conjunction with processor 412, memory / multiple memories 416, transceiver 402, etc.) can prioritize second communications at least in part on degrading the first communication to use a smaller number of antennas.

[0131] Figure 11 This is a block diagram of a MIMO communication system 1100 including base station 102 and UE 104. Examples of the MIMO communication system 1100 can be found by reference. Figure 1 The wireless communication access network 100 is described in various aspects. Base station 102 may be a reference. Figure 1Examples of various aspects of the described base station 102 are provided. Base station 102 may be equipped with antennas 1134 and 1135, and UE 104 may be equipped with antennas 1152 and 1153. In the MIMO communication system 1100, base station 102 can transmit data simultaneously through multiple communication links. Each communication link may be referred to as a "layer," and the "rank" of the communication link indicates the number of layers used for communication. For example, in a 2x2 MIMO communication system in which base station 102 transmits two "layers," the rank of the communication link between base station 102 and UE 104 is two.

[0132] At base station 102, a transmit (Tx) processor 1120 can receive data from a data source. The transmit processor 1120 can process the data. The transmit processor 1120 can also generate control symbols or reference symbols. A transmit MIMO processor 1130 can perform spatial processing (e.g., pre-decoding, if applicable) on the data symbols, control symbols, or reference symbols, and can provide output symbol streams to transmit modulators / demodulators 1132 and 1133. Each modulator / demodulator 1132 to 1133 can process (e.g., for OFDM, etc.) its corresponding output symbol stream to obtain an output sample stream. Each modulator / demodulator 1132 to 1133 can further process the output sample stream (e.g., perform analog conversion, amplification, filtering, and up-conversion) to obtain a DL signal. In one example, the DL signals from modulators / demodulators 1132 and 1133 can be transmitted via antennas 1134 and 1135, respectively.

[0133] UE 104 can be used as a reference. Figure 1 and Figure 3 Examples of various aspects of the described UE 104. At UE 104, UE antennas 1152 and 1153 can receive DL signals from base station 102 and can provide the received signals to modulators / demodulators 1154 and 1155, respectively. Each modulator / demodulator 1154 to 1155 can adjust (e.g., filter, amplify, downconvert, and digitize) the corresponding received signal to obtain an input sample. Each modulator / demodulator 1154 to 1155 can further process (e.g., for OFDM, etc.) the input sample to obtain a received symbol. A MIMO detector 1156 can obtain the received symbols from modulators / demodulators 1154 and 1155, perform MIMO detection on the received symbols (if applicable), and provide the detected symbols. The receive (Rx) processor 1158 can process (e.g., demodulate, deinterleave, and decode) the detected symbols, thereby providing decoded data for UE 104 to the data output and providing decoded control information to the processor 1180 or the memory / multiple memories 1182.

[0134] In some cases, processor 1180 may execute stored instructions to instantiate UE communication component 342 (see, for example...). Figure 1 and Figure 3 ).

[0135] On the uplink (UL), at UE 104, a transmitting processor 1164 can receive and process data from a data source. The transmitting processor 1164 can also generate reference symbols for a reference signal. Symbols from the transmitting processor 1164 can be pre-decoded (if applicable) by a transmitting MIMO processor 1166, further processed by modulators / demodulators 1154 and 1155 (e.g., for single-carrier FDMA, etc.), and transmitted to base station 102 according to communication parameters received from base station 102. At base station 102, the UL signal from UE 104 can be received by antennas 1134 and 1135, processed by modulators / demodulators 1132 and 1133, detected (if applicable) by a MIMO detector 1136, and further processed by a receiving processor 1138. The receiving processor 1138 can provide decoded data to a data output and processor 1140 or memory / multiple memories 1142.

[0136] In some cases, processor 1140 may execute stored instructions to instantiate BS communication component 442 (see, for example...). Figure 1 and Figure 4 ).

[0137] Components of UE 104 may be implemented individually or collectively using one or more ASICs, which are adapted to perform some or all of the applicable functions in hardware. Each of the indicated modules may be a component for performing one or more functions related to the operation of the MIMO communication system 1100. Similarly, components of base station 102 may be implemented individually or collectively using one or more application-specific integrated circuits (ASICs), which are adapted to perform some or all of the applicable functions in hardware. Each of the indicated components may be a component for performing one or more functions related to the operation of the MIMO communication system 1100.

[0138] The following aspects are merely illustrative and may be combined with other embodiments or aspects of the teachings described herein without limitation.

[0139] Aspect 1 is a method for wireless communication at a UE, the method comprising: receiving a configuration for a first antenna of the UE to receive downlink signaling in a first frequency band; receiving from a network node an instruction to use the first antenna together with a second antenna of the UE to receive downlink signaling in a second frequency band during a time period; and using the first antenna and the second antenna to receive downlink signaling in the second frequency band during the time period.

[0140] In aspect 2, the method according to aspect 1 includes: wherein the indication includes a semi-static indication for receiving downlink signaling in the second frequency band using the first antenna according to a configured time period pattern.

[0141] In aspect 3, the method according to any one of aspects 1 or 2 includes: wherein receiving the indication includes: receiving a downlink grant including the indication from the network node.

[0142] In aspect 4, the method according to aspect 3 includes: wherein the time period corresponds to the time resource specified in the downlink grant.

[0143] In aspect 5, the method according to any one of aspects 3 or 4 includes: wherein the time period corresponds to a duration until another downlink grant is received, the other downlink grant indicating the use of the first antenna to receive downlink signaling in a frequency band different from the second frequency band.

[0144] In aspect 6, the method according to any one of aspects 3 to 5 includes: wherein the time period corresponds to the observation period of a time slot subset.

[0145] In aspect 7, the method according to any one of aspects 3 to 6 includes: wherein the time period begins after a feedback is sent for the received downlink communication.

[0146] In aspect 8, the method according to aspect 7 includes: wherein the first antenna is used to receive downlink signaling in the second frequency band based on sending the feedback as including an acknowledgment.

[0147] In aspect 9, the method according to any one of aspects 3 to 8 includes: wherein the downlink grant is received in DCI or MAC-CE.

[0148] In aspect 10, the method according to any one of aspects 1 to 9 includes: receiving a reference signal configuration from the network node, the reference signal configuration indicating the number of antennas for performing reference signal measurements; and sending to the network node the reference signal measurements performed using the number of antennas.

[0149] In aspect 11, the method according to aspect 10 includes: wherein the reference signal configuration indicates the use of at least the first antenna and the second antenna to measure CSI-RS for reporting the CSI of the second frequency band.

[0150] In aspect 12, the method according to aspect 11 includes: wherein the reference signal configuration indicates the number of antennas for one or more of a CSI report configuration, resource settings, or resources.

[0151] In aspect 13, the method according to any one of aspects 1 to 12 includes: wherein receiving the indication includes: receiving downlink permission from the network node, the downlink permission including the indication and a second indication of the number of antennas used to measure CSI-RS for reporting CSI in the second frequency band.

[0152] In aspect 14, the method according to aspect 13 includes: wherein receiving the second instruction occurs at the start of the observation period of a time slot subset.

[0153] In aspect 15, the method according to any one of aspects 13 or 14 includes: wherein the time period corresponds to a handover gap after the downlink permission is received.

[0154] In aspect 16, the method according to any one of aspects 1 to 15 includes: receiving a second indication of the number of antennas used to measure CSI-RS for reporting CSI in the second frequency band in an authorized RRC configuration for a configuration corresponding to the downlink signaling in the second frequency band.

[0155] In aspect 17, the method according to any one of aspects 1 to 16 includes: determining, at least in part, the number of antennas for measuring CSI-RS for reporting CSI in the second frequency band based on a time pattern, to include at least the first antenna and the second antenna.

[0156] In aspect 18, the method according to aspect 17 includes: receiving from the network node an indication of the time pattern in RRC signaling, the RRC signaling configuring resources for the downlink signaling.

[0157] Aspect 19 is a method for wireless communication at a UE, the method comprising: receiving one or more configurations indicating resources for transmitting SRS to a network node in a first frequency band using each of a plurality of combinations of a plurality of antennas, wherein at least one of the plurality of combinations is based on switching one or more antennas of the plurality of antennas configured for a second frequency band to the first frequency band; and transmitting SRS to the network node in the first frequency band and using at least one of the plurality of combinations based on switching the one or more antennas of the plurality of antennas configured for the second frequency band to be used in the first frequency band.

[0158] In aspect 20, the method according to aspect 19 includes: wherein the one or more configurations include a single configuration indicating each of the plurality of combinations, and receiving from the network node an indication of at least one of the plurality of combinations for transmitting the SRS.

[0159] In aspect 21, the method according to any one of aspects 19 or 20 includes: wherein the one or more configurations include a configuration for each of the plurality of combinations, and receiving from the network node an indication of at least one configuration for transmitting the SRS.

[0160] In aspect 22, the method according to any one of aspects 19 to 21 includes: wherein the one or more configuration indications correspond to one or more of the SRS port, SRS resource or SRS set corresponding to each of the plurality of combinations.

[0161] In aspect 23, the method according to any one of aspects 19 to 22 includes: receiving downlink control information from the network node, the downlink control information indicating at least one of the plurality of combinations for transmitting the SRS.

[0162] In aspect 24, the method according to any one of aspects 19 to 23 includes: selecting at least one combination of the plurality of combinations based on a semi-static style.

[0163] In aspect 25, the method according to any one of aspects 19 to 24 includes: selecting at least one of the plurality of combinations based on a preference for an indication of a portion of the plurality of antennas associated with the one of the plurality of combinations.

[0164] In aspect 26, the method according to any one of aspects 19 to 25 includes: sending a report to the network node, the report indicating, for each of the first frequency band and the second frequency band, the number of transmit antennas and the number of receive antennas that can be configured, and indicating, for the frequency band pair of the first frequency band and the second frequency band, whether receive antenna switching, transmit antenna switching, or both are supported, wherein the one or more configurations are received based on the report.

[0165] In aspect 27, the method according to aspect 26 includes: wherein the one or more configurations include a configuration for a combination of the number of transmit antennas and the number of receive antennas that can be configured for each of the first frequency band and the second frequency band.

[0166] In aspect 28, the method according to any one of aspects 19 to 27 includes: wherein sending the SRS signaling is performed using increased power based on a subset of the SRS ports indicated in the configuration.

[0167] Aspect 29 is a method for wireless communication at a network node, the method comprising: sending a configuration to a UE instructing a first antenna of the UE to receive downlink signaling in a first frequency band; and sending an instruction to the UE to use the first antenna together with a second antenna of the UE to receive downlink signaling in a second frequency band during a time period.

[0168] In aspect 30, the method according to aspect 29 includes: wherein the indication includes a semi-static indication for receiving downlink signaling in the second frequency band using the first antenna according to a configured time period pattern.

[0169] In aspect 31, the method according to any one of aspects 29 or 30 includes: wherein receiving the indication includes: receiving a downlink grant including the indication from the network node.

[0170] In aspect 32, the method according to aspect 31 includes: wherein the time period corresponds to the time resource specified in the downlink grant.

[0171] In aspect 33, the method according to any one of aspects 31 or 32 includes: wherein the time period corresponds to a duration until the transmission of another downlink grant, the other downlink grant indicating the use of the first antenna to receive downlink signaling in a frequency band different from the second frequency band.

[0172] In aspect 34, the method according to any one of aspects 31 to 33 includes: wherein the time period corresponds to the observation period of a time slot subset.

[0173] In aspect 35, the method according to any one of aspects 31 to 34 includes: wherein the time period begins after a feedback is received for downlink communication.

[0174] In aspect 36, the method according to any one of aspects 31 to 35 includes: wherein the downlink grant is transmitted in DCI or MAC-CE.

[0175] In aspect 37, the method according to any one of aspects 29 to 36 includes: sending a reference signal configuration to the UE, the reference signal configuration indicating the number of antennas for performing reference signal measurements; and receiving from the UE reference signal measurements performed using multiple antennas.

[0176] In aspect 38, the method according to aspect 37 includes: wherein the reference signal configuration indicates the use of at least the first antenna and the second antenna to measure CSI-RS for reporting the CSI of the second frequency band.

[0177] In aspect 39, the method according to aspect 38 includes: wherein the reference signal configuration indicates the number of antennas for one or more of a CSI report configuration, resource settings, or resources.

[0178] In aspect 40, the method according to any one of aspects 29 to 39 includes: wherein sending the indication includes: sending downlink permission to the UE, the downlink permission including the indication and a second indication of the number of antennas used to measure CSI-RS for reporting CSI of the second frequency band.

[0179] In aspect 41, the method according to aspect 40 includes: wherein the second instruction is sent at the start of the observation period of a time slot subset.

[0180] In aspect 42, the method according to any one of aspects 40 or 41 includes: wherein the time period corresponds to a handover gap after the downlink grant is sent.

[0181] In aspect 43, the method according to any one of aspects 29 to 42 includes: in an authorized RRC configuration for a configuration corresponding to the downlink signaling in the second frequency band, transmitting a second indication of the number of antennas for measuring CSI-RS for reporting CSI in the second frequency band.

[0182] In aspect 44, the method according to any one of aspects 29 to 43 includes: sending to the UE an indication of a time pattern in RRC signaling, the RRC signaling configuring resources for the downlink signaling; and using a plurality of antennas based on the time pattern to receive CSI-RS measurements of the second frequency band from the UE.

[0183] Aspect 45 is a method for wireless communication at a network node, the method comprising: transmitting one or more configurations to a UE, the one or more configurations indicating resources for transmitting SRS in a first frequency band using each of a plurality of combinations of a plurality of antennas, wherein at least one of the plurality of combinations is based on switching one or more antennas of the plurality of antennas configured for a second frequency band to the first frequency band; and receiving SRS from the UE in the first frequency band, wherein the SRS is based on the at least one of the plurality of combinations.

[0184] In aspect 46, the method according to aspect 45 includes: wherein the one or more configurations include a single configuration indicating each of the plurality of combinations, and transmitting for the UE an indication of at least one of the plurality of combinations for transmitting the SRS.

[0185] In aspect 47, the method according to any one of aspects 45 or 46 includes: wherein the one or more configurations include a configuration for each of the plurality of combinations, and an indication for at least one configuration for transmitting the SRS is sent to the UE.

[0186] In aspect 48, the method according to any one of aspects 45 to 47 includes: wherein the one or more configuration indications correspond to one or more of the SRS port, SRS resource or SRS set corresponding to each of the plurality of combinations.

[0187] In aspect 49, the method according to any one of aspects 45 to 48 includes: sending downlink control information to the UE, the downlink control information indicating at least one of the plurality of combinations for sending the SRS.

[0188] In aspect 50, the method according to any one of aspects 45 to 49 includes: at least one of the plurality of combinations is based on a semi-static style.

[0189] In aspect 51, the method according to any one of aspects 45 to 50 includes: at least one of the plurality of combinations is based on a preference for an indication of which SRS to use.

[0190] In aspect 52, the method according to any one of aspects 45 to 51 includes: receiving a report for the UE, the report indicating, for each of the first frequency band and the second frequency band, the number of transmit antennas and the number of receive antennas that can be configured, and indicating, for the frequency band pair of the first frequency band and the second frequency band, whether receive antenna switching, transmit antenna switching or both are supported, wherein the transmission of the one or more configurations is based on the report.

[0191] In aspect 53, the method according to aspect 52 includes: wherein the one or more configurations include a configuration for a combination of the number of transmit antennas and the number of receive antennas that can be configured for each of the first frequency band and the second frequency band.

[0192] Aspect 54 is a method for performing wireless communication at a UE, the method comprising: receiving from a network node an instruction for configuring SPS or CG resources for a first communication in a first frequency band during a time period; receiving from the network node an instruction for performing antenna switching of at least a portion of a plurality of antennas from the first frequency band to a second frequency band to perform a second communication during the time period; and utilizing the network node and performing at least one of the first communication or the second communication based on a priority ordering rule.

[0193] In aspect 55, the method according to aspect 54 includes: wherein the instruction for performing antenna switching is received in a scheduling grant for the second communication.

[0194] In aspect 56, the method according to any one of aspects 54 or 55 includes: wherein performing at least one of the first communication or the second communication comprises: performing one of the first communication or the second communication; and avoiding performing the other of the first communication or the second communication.

[0195] In aspect 57, the method according to aspect 56 includes: wherein the priority ordering rule indicates prioritizing the communications based on dynamic or configured granting, based on channel type, based on serving cell index, or based on content carried by the communications.

[0196] In aspect 58, the method according to any one of aspects 54 to 57 includes: wherein the priority ordering rule instructs, based on the instruction, to degrade the first communication to use a smaller number of antennas, and wherein performing at least one of the first communication or the second communication includes: performing the first communication using the smaller number of antennas; and performing the second communication using at least a portion of a plurality of antennas switched to the second frequency band.

[0197] Aspect 59 is a method for wireless communication at a network node, the method comprising: sending to a UE an instruction for configuring SPS or CG resources for a first communication in a first frequency band during a time period; sending to the UE an instruction for performing antenna switching of at least a portion of a plurality of antennas from the first frequency band to a second frequency band to perform a second communication during the time period; and utilizing the UE and performing at least one of the first communication or the second communication based on a priority ordering rule.

[0198] In aspect 60, the method according to aspect 59 includes: wherein the instruction for performing antenna switching is received in a scheduling grant for the second communication.

[0199] In aspect 61, the method according to any one of aspects 59 or 60 includes: wherein performing at least one of the first communication or the second communication comprises: performing one of the first communication or the second communication; and avoiding performing the other of the first communication or the second communication.

[0200] In aspect 62, the method according to aspect 61 includes: wherein the priority ordering rule indicates prioritizing the communications based on dynamic or configured granting, based on channel type, based on serving cell index, or based on content carried by the communications.

[0201] In aspect 63, the method according to any one of aspects 59 to 62 includes: wherein the priority ordering rule instructs, based on the instruction, to degrade the first communication to use a smaller number of antennas, and wherein performing at least one of the first communication or the second communication includes: performing the first communication using the smaller number of antennas based on the UE; and performing the second communication using at least a portion of a plurality of antennas switched to the second frequency band based on the UE.

[0202] Aspect 64 is an apparatus for wireless communication, the apparatus comprising: one or more processors; one or more memories coupled to the one or more processors; and instructions stored in the one or more memories and operable, when executed by the one or more processors, to cause the apparatus to perform any of the methods described in aspects 1 to 63.

[0203] Aspect 65 is an apparatus for wireless communication, the apparatus including components for performing any of the methods described according to aspects 1 to 63.

[0204] Aspect 66 is one or more computer-readable media, the computer-readable medium including code executable by one or more processors for wireless communication, the code including code for performing any of the methods described according to aspects 1 to 63.

[0205] The above detailed description, illustrated in conjunction with the accompanying drawings, describes examples and does not represent only examples that can be implemented or fall within the scope of the claims. The term "example" as used in this description means "serving as an example, instance, or illustration," not "preferred" or "advantageous over other examples." The detailed description includes specific details used to provide an understanding of the described techniques. However, these techniques can be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0206] Information and signals can be represented using any of a variety of different techniques and skills. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned in the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or particles, light fields or particles, computer-executable code or instructions stored on a computer-readable medium, or any combination thereof.

[0207] The various exemplary frames and components described in connection with the disclosure herein may be implemented or executed using specially programmed devices, such as, but not limited to, processors, digital signal processors (DSPs), ASICs, field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof, designed to perform the functions described herein. While a specially programmed processor may be a microprocessor, in alternative embodiments, the processor may be any conventional processor, controller, microcontroller, or state machine. A specially programmed processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors cooperating with a DSP core, or any other such configuration.

[0208] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or code on or transmitted via a non-transitory computer-readable medium. Other examples and specific implementations fall within the scope and spirit of this disclosure and the appended claims. For example, due to the nature of software, the functions described above may be implemented using hardware, firmware, hardwired, software executed by a specially programmed processor, or any combination of these. Features implementing the functions may also be physically located in various locations, including various portions distributed such that the functions are implemented in different physical locations. Additionally, as used herein, including in the claims, the word "or" used in a list of entries beginning with "at least one of" indicates a distributed list, such that a list such as "at least one of A, B, or C" means A or B or C or AB or AC or BC or ABC (i.e., A and B and C).

[0209] Computer-readable media includes both computer storage media and communication media, with the latter including any medium that facilitates the transfer of a computer program from one place to another. Storage media can be any available medium accessible by a general-purpose or special-purpose computer. By way of example, and not limitation, computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disc storage devices, magnetic disk storage devices or other magnetic storage devices, or any other medium capable of carrying or storing desired program code components in the form of instructions or data structures, and accessible by a general-purpose or special-purpose computer or a general-purpose or special-purpose processor. Furthermore, any connection is appropriately referred to as computer-readable media. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included within the definition of media. As used herein, disks and optical discs include compact optical discs (CDs), laser optical discs, optical discs, digital versatile optical discs (DVDs), floppy disks, and Blu-ray discs, where disks typically copy data magnetically, while optical discs use lasers to copy data optically. Combinations of the above are also included within the scope of computer-readable media.

[0210] The prior description of this disclosure is provided to enable those skilled in the art to implement or use it. Various modifications to this disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of this disclosure. Furthermore, while elements of the described aspects and / or embodiments are described or claimed in the singular, plural forms are contemplated unless explicitly stated otherwise. Additionally, unless otherwise stated, all or part of any aspect and / or embodiment may be used in conjunction with all or part of any other aspect and / or embodiment. Therefore, this disclosure is not limited to the examples and designs described herein, but should be granted the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. An apparatus for wireless communication, the apparatus comprising: transceiver; One or more memories, the one or more memories being configured to store instructions individually or in combination; and One or more processors, the one or more processors being communicatively coupled to the one or more memories, wherein the one or more processors are individually or in combination configured to execute the instructions to cause the device to: Receive configuration for the first antenna of the device to receive downlink signaling in a first frequency band; Receive from the network node an instruction to use the first antenna together with the second antenna of the device to receive downlink signaling in the second frequency band during the time period; as well as During the time period, the first antenna and the second antenna are used to receive downlink signaling in the second frequency band.

2. The apparatus of claim 1, wherein the indication includes a semi-static indication for receiving downlink signaling in the second frequency band using the first antenna according to a configured time period pattern.

3. The apparatus of claim 1, wherein the one or more processors are individually or in combination configured to execute the instructions to cause the apparatus to: receive the indication from the network node in downlink grant.

4. The apparatus of claim 3, wherein the time period corresponds to the time resource specified in the downlink grant.

5. The apparatus of claim 3, wherein the time period corresponds to the duration until another downlink grant is received, the other downlink grant indicating the use of the first antenna to receive downlink signaling in a frequency band different from the second frequency band.

6. The apparatus of claim 3, wherein the time period corresponds to the observation period of a time slot subset.

7. The apparatus of claim 3, wherein the time period begins after feedback has been sent for the received downlink communication.

8. The apparatus of claim 7, wherein the one or more processors are individually or in combination configured to execute the instructions to cause the apparatus to: receive the downlink signaling in the second frequency band using the first antenna based on sending the feedback as including an acknowledgment.

9. The apparatus of claim 3, wherein the downlink grant is received in downlink control information (DCI) or media access control (MAC)-control element (CE).

10. The apparatus of claim 1, wherein the one or more processors are individually or in combination configured to execute the instructions to cause the apparatus to: Receive reference signal configuration from the network node, the reference signal configuration indicating the number of antennas for performing reference signal measurements; and The reference signal measurement performed using the stated number of antennas is sent to the network node.

11. The apparatus of claim 10, wherein the reference signal configuration indicates the use of at least the first antenna and the second antenna to measure a channel state information (CSI) reference signal (RS) for reporting the CSI of the second frequency band.

12. The apparatus of claim 11, wherein the reference signal configuration indicates the number of antennas for one or more of a CSI reporting configuration, resource settings, or resources.

13. The apparatus of claim 1, wherein the one or more processors are individually or in combination configured to execute the instructions to cause the apparatus to: receive the indication from the network node in downlink grant, and receive a second indication of the number of antennas for measuring channel state information (CSI)-reference signals (RS) for reporting CSI in the second frequency band.

14. The apparatus of claim 13, wherein the one or more processors are individually or in combination configured to execute the instructions to cause the apparatus to: receive the second instruction at the start of the observation period of a subset of time slots.

15. The apparatus of claim 13, wherein the time period corresponds to a handover gap after the downlink permission is received.

16. The apparatus of claim 1, wherein the one or more processors are individually or in combination configured to execute the instructions to cause the apparatus to: receive, in an authorized radio resource control (RRC) configuration corresponding to the downlink signaling in the second frequency band, a second indication of the number of antennas for measuring channel state information (CSI)-reference signals (RS) for reporting the CSI of the second frequency band.

17. The apparatus of claim 1, wherein the one or more processors are individually or in combination configured to execute the instructions to cause the apparatus to: determine, at least in part based on a time pattern, the number of antennas for measuring channel state information (CSI)-reference signals (RS) for reporting CSI in the second frequency band, including at least the first antenna and the second antenna.

18. The apparatus of claim 17, wherein the one or more processors are individually or in combination configured to execute the instructions to cause the apparatus to: receive from the network node an indication of the time pattern in radio resource control (RRC) signaling, the radio resource control (RRC) signaling configuring resources for the downlink signaling.

19. An apparatus for wireless communication, the apparatus comprising: transceiver; One or more memories, the one or more memories being configured to store instructions individually or in combination; and One or more processors, the one or more processors being communicatively coupled to the one or more memories, wherein the one or more processors are individually or in combination configured to execute the instructions to cause the device to: Receive one or more configurations, the one or more configurations indicating resources for transmitting sounding reference signals (SRS) to network nodes in a first frequency band using each of a plurality of combinations of a plurality of antennas, wherein at least one of the plurality of combinations is based on switching one or more antennas of the plurality of antennas configured for a second frequency band to the first frequency band; as well as Based on switching one or more antennas configured for the second frequency band among the plurality of antennas to be used in the first frequency band, SRS is transmitted to the network node in the first frequency band using at least one of the plurality of combinations.

20. The apparatus of claim 19, wherein the one or more configurations include a single configuration indicating each of the plurality of combinations, and wherein the one or more processors are individually or in combination configured to execute the instructions to cause the apparatus to: receive from the network node an indication of at least one of the plurality of combinations for transmitting the SRS.

21. The apparatus of claim 19, wherein the one or more configurations include a configuration for each of the plurality of combinations, and wherein the one or more processors are individually or in combination configured to execute the instructions to cause the apparatus to: receive from the network node an indication of at least one configuration for transmitting the SRS.

22. The apparatus of claim 19, wherein the one or more configurations indicate one or more of the SRS ports, SRS resources or SRS sets corresponding to each of the plurality of combinations.

23. The apparatus of claim 19, wherein the one or more processors are individually or in combination configured to execute the instructions to cause the apparatus to: receive downlink control information from the network node, the downlink control information indicating at least one of the plurality of combinations for transmitting the SRS.

24. The apparatus of claim 19, wherein the one or more processors are individually or in combination configured to execute the instructions to cause the apparatus to: select at least one of the plurality of combinations based on a semi-static pattern.

25. The apparatus of claim 19, wherein the one or more processors are individually or in combination configured to execute the instructions to cause the apparatus to: select at least one of the plurality of combinations based on a preference for an indication of a portion of the plurality of antennas associated with the one of the plurality of combinations.

26. The apparatus of claim 19, wherein the one or more processors are individually or in combination configured to execute the instructions to cause the apparatus to: send a report to the network node, the report indicating, for each of the first frequency band and the second frequency band, the number of transmit antennas and the number of receive antennas that can be configured, and indicating, for the frequency band pair of the first frequency band and the second frequency band, whether receive antenna switching, transmit antenna switching, or both are supported, wherein the one or more processors are individually or in combination configured to execute the instructions to cause the apparatus to: receive the one or more configurations based on the report.

27. The apparatus of claim 26, wherein the one or more configurations include a configuration for a combination of the number of transmit antennas and the number of receive antennas that can be configured for each of the first frequency band and the second frequency band.

28. The apparatus of claim 19, wherein the one or more processors are individually or in combination configured to execute the instructions to cause the apparatus to: transmit the SRS signaling using increased power based on a subset of the SRS ports indicated in the configuration.

29. A method for conducting wireless communication at a user equipment (UE), the method comprising: Receive configuration for the first antenna of the UE to receive downlink signaling in the first frequency band; Receive from the network node an instruction to use the first antenna together with the second antenna of the UE to receive downlink signaling in the second frequency band during the time period; as well as During the time period, the first antenna and the second antenna are used to receive downlink signaling in the second frequency band.

30. A method for conducting wireless communication at a user equipment (UE), the method comprising: Receive one or more configurations, the one or more configurations indicating resources for transmitting sounding reference signals (SRS) to network nodes in a first frequency band using each of a plurality of combinations of a plurality of antennas, wherein at least one of the plurality of combinations is based on switching one or more antennas of the plurality of antennas configured for a second frequency band to the first frequency band; as well as Based on switching one or more antennas configured for the second frequency band among the plurality of antennas to be used in the first frequency band, SRS is transmitted to the network node in the first frequency band using at least one of the plurality of combinations.

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