Method and apparatus for reporting coherent MIMO capabilities

Abstract

Aspects of the disclosure include methods, apparatus, and computer-readable media for generating a capability message indicating a first coherence capability of a first frequency, a second coherence capability of a second frequency, and an uplink (UL) transmit (TX) switching coherence capability, transmitting the capability message to a base station, receiving UL scheduling information for transmitting first UL data using the first frequency and second UL data using the second frequency, and transmitting at least one of the first UL data or the second UL data based on the UL scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of PCT Application No. PCT / CN2021 / 080149, filed March 11, 2021, entitled "METHOD AND APPARATUS FOR REPORTING COHERENT MIMO CAPABILITY," which is expressly incorporated herein by reference in its entirety.

[0002] Aspects of the present disclosure relate generally to wireless communications, and more particularly to apparatus and methods for reporting coherent multiple-input multiple-output (MIMO) capabilities. [Background technology]

[0003] Wireless communication networks are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasts, etc. These systems may 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.

[0004] These multiple access technologies are being adopted in various telecommunications standards to provide common protocols that enable different wireless devices to communicate on a city, national, regional, or even global scale. For example, fifth-generation (5G) wireless communication technology (sometimes referred to as new radio (NR)) is envisioned to enhance and support diverse usage scenarios and applications for current mobile network generations. In one aspect, 5G communication technology can include enhanced mobile broadband, which addresses human-centric use cases for accessing multimedia content, services, and data; ultra-reliable-low latency communications (URLLC) with several specifications for latency and reliability; and massive machine-type communications, which can enable a very large number of connected devices and the transmission of information that is not affected by relatively small amounts of delay. However, as demand for mobile broadband access continues to increase, further improvements beyond NR communication technology may be desirable.

[0005] In a wireless communication network, a user equipment (UE) may be configured to transmit uplink (UL) information to a base station (BS) using coherent multiple-input multiple-output (MIMO) technology. When using coherent MIMO technology for UL transmission, the UE may utilize two or more antennas to transmit UL information using fully or partially coherent waveforms in two or more UL transmission (TX) chains. Coherent transmission has the advantage of increasing data rate and / or reliability. However, coherent transmission may require two or more UL TX chains to maintain coherence. If one (or more) of the two or more UL TX chains is unable to maintain coherence, the codebook used by the UE may need to be updated. Therefore, improvements in reporting may be desirable. Summary of the Invention [Means for solving the problem]

[0006] The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, nor is it intended to identify key or critical elements of all aspects or to delineate 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 is presented later.

[0007] Aspects of the present disclosure include a method by a user equipment (UE) for generating a capability message indicating a first coherence capability of a first frequency, a second coherence capability of a second frequency, and an uplink (UL) transmit (TX) switching coherence capability; transmitting the capability message to a base station; receiving UL scheduling information for transmitting first UL data using the first frequency and second UL data using the second frequency; and transmitting at least one of the first UL data or the second UL data based on the UL scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

[0008] Another aspect of the present disclosure includes a user equipment (UE) having a memory comprising instructions, one or more processors configured to execute the instructions in the memory to generate a capability message indicating a first coherence capability of a first frequency, a second coherence capability of a second frequency, and an uplink (UL) transmit (TX) switching coherence capability, and a transceiver, wherein the transceiver is configured to: transmit the capability message to a base station; receive UL scheduling information for transmitting first UL data using the first frequency and second UL data using the second frequency; and transmit at least one of the first UL data or the second UL data based on the UL scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

[0009] Aspects of the present disclosure include a user equipment (UE) including: means for generating a capability message indicating a first coherence capability of a first frequency, a second coherence capability of a second frequency, and an uplink (UL) transmit (TX) switching coherence capability; means for transmitting the capability message to a base station; means for receiving UL scheduling information for transmitting first UL data using the first frequency and second UL data using the second frequency; and means for transmitting at least one of the first UL data or the second UL data based on the UL scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

[0010] Some aspects of the present disclosure include a non-transitory computer-readable medium having stored thereon instructions that, when executed by one or more processors of a user equipment (UE), cause the one or more processors to: generate a capability message indicating a first coherence capability of a first frequency, a second coherence capability of a second frequency, and an uplink (UL) transmit (TX) switching coherence capability; transmit the capability message to a base station; receive UL scheduling information for transmitting first UL data using the first frequency and second UL data using the second frequency; and transmit at least one of the first UL data or the second UL data based on the UL scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

[0011] Aspects of the present disclosure include a method by a base station (BS) including receiving, from a user equipment (UE), a capability message indicating a first coherence capability of a first frequency, a second coherence capability of a second frequency, and an uplink (UL) transmit (TX) switching coherence capability; transmitting, to the UE, UL scheduling information for transmitting, by the UE, first UL data using the first frequency and second UL data using the second frequency; and receiving, from the UE, at least one of the first UL data or the second UL data based on the UL scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

[0012] Another aspect of the present disclosure includes a base station (BS) having a memory comprising instructions, one or more processors configured to execute the instructions in the memory, and a transceiver configured to: receive a capability message from a user equipment (UE) indicating a first coherence capability of a first frequency, a second coherence capability of a second frequency, and an uplink (UL) transmit (TX) switching coherence capability; transmit UL scheduling information to the UE for transmission by the UE of first UL data using the first frequency and second UL data using the second frequency; and receive at least one of the first UL data or the second UL data from the UE based on the UL scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

[0013] Aspects of the present disclosure include a base station (BS) including: means for receiving, from a user equipment (UE), a capability message indicating a first coherence capability of a first frequency, a second coherence capability of a second frequency, and an uplink (UL) transmit (TX) switching coherence capability; means for transmitting, to the UE, UL scheduling information for transmitting, by the UE, first UL data using the first frequency and second UL data using the second frequency; and means for receiving, from the UE, at least one of the first UL data or the second UL data based on the UL scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

[0014] Some aspects of the present disclosure include a non-transitory computer-readable medium having stored thereon instructions that, when executed by one or more processors of a base station (BS), cause the one or more processors to receive from a user equipment (UE) a capability message indicating a first coherence capability of a first frequency, a second coherence capability of a second frequency, and an uplink (UL) transmit (TX) switching coherence capability; transmit to the UE UL scheduling information for transmission by the UE of first UL data using the first frequency and second UL data using the second frequency; and receive from the UE at least one of the first UL data or the second UL data based on the UL scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

[0015] To the accomplishment of the foregoing and related ends, the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of the various aspects may be employed, and the description is intended to include all such aspects and their equivalents.

[0016] The disclosed aspects are described below in connection with the accompanying drawings, in which like reference numerals refer to like elements, and in which: FIG. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 illustrates an example of a wireless communication system and access network in accordance with various aspects of the present disclosure. [Figure 2] FIG. 1 is a schematic diagram of an example of a user equipment, according to an aspect of the present disclosure. [Figure 3] FIG. 2 is a schematic diagram of an example base station according to an aspect of the present disclosure. [Figure 4] 1 is an example diagram illustrating coherence capability reporting by a UE according to an aspect of the present disclosure. [Figure 5] FIG. 1 illustrates an example method for reporting coherence capabilities according to aspects of the present disclosure. [Figure 6] FIG. 1 illustrates an example method for transmitting a codebook according to an aspect of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0018] The detailed description, set forth below with reference to the accompanying drawings, illustrates various configurations and does not represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form to avoid obscuring such concepts.

[0019] Several aspects of a telecommunications system will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the particular application and design constraints imposed on the overall system.

[0020] As an example, an element, or any portion of an element, or any combination of elements, may be implemented as a "processing system" including one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on a chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gate logic, discrete hardware circuits, and other suitable hardware configured to perform various functionality described throughout this disclosure. One or more processors in a processing system may execute software. Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0021] Thus, in one or more exemplary embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, the functions may be stored on or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media. A storage medium may be any available medium that can be accessed by a computer. By way of example, and not limitation, such computer-readable media may comprise random-access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the above types of computer-readable media, or any other medium that can be used to store computer-executable code in the form of instructions or data structures that can be accessed by a computer.

[0022] In one implementation, a user equipment (UE) may transmit uplink (UL) information to a base station (BS) using multiple-input multiple-output (MIMO) technology. When MIMO technology is used for UL transmission, the UE may utilize two or more antennas and / or antenna ports to transmit UL information using fully or partially coherent waveforms in two or more UL transmit (TX) chains. The UE may transmit UL information using two or more frequencies. When the UE switches transmission frequencies for the UL TX chains, coherency may or may not be maintained.

[0023] In certain aspects of the present disclosure, a UE may generate a capability message indicating a first coherence capability for a first frequency, a second coherence capability for a second frequency, and a UL TX switching coherence capability associated with a UL TX switching. A UL TX switching occurs when a UL TX chain changes from transmitting on a first frequency to transmitting on a second frequency. The UE may transmit the capability message to a BS. In response, the BS may transmit an instruction to the UE indicating to the UE to use a fully coherent codebook, a partially coherent codebook, or a noncoherent codebook to transmit UL information. The BS may determine the codebook based on the received capability message and the first coherence capability, the second coherence capability, and / or the UL TX switching coherence capability.

[0024] 1 illustrates 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)) includes at least one BS 105, a UE 110, an Evolved Packet Core (EPC) 160, and a 5G Core (5GC) 190. The BS 105 may include macrocells (high-power cellular base stations) and / or small cells (low-power cellular base stations). Macrocells include base stations. Small cells include femtocells, picocells, and microcells. In one implementation, the UE 110 may include a communication component 222 configured to communicate with the BS 105 via a cellular network, a Wi-Fi network, or other wireless and wired networks. The UE 110 may include a coherence component 224 configured to determine coherence of one or more frequencies, frequency combinations, bands, and / or switches. In some implementations, the communication component 222 and / or the coherence component 224 may be implemented using hardware, software, or a combination of hardware and software. In some implementations, the BS 105 may include a communication component 322 configured to communicate with the UE 110. The BS 105 may include a determination component 324 configured to determine a codebook for the UE 110. In some implementations, the communication component 322 and / or the determination component 324 may be implemented using hardware, software, or a combination of hardware and software.

[0025] A BS 105 configured for 4G Long-Term Evolution (LTE) (collectively referred to as the Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with the EPC 160 through a backhaul link interface 132 (e.g., an S1, X2, Internet Protocol (IP), or flex interface). A BS 105 configured for 5G NR (collectively referred to as the Next Generation RAN (NG-RAN)) may interface with the 5GC 190 through a backhaul link interface 134 (e.g., an S1, X2, Internet Protocol (IP), or flex interface). In addition to other functions, the BSs 105 may perform one or more of the following functions: forwarding user data, encryption and decryption of radio channels, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection setup and release, load balancing, distribution for 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, positioning, and delivery of alert messages. The BSs 105 may communicate with each other directly or indirectly (e.g., through the EPC 160 or 5GC 190) via backhaul link interfaces 134. The backhaul links 132, 134 may be wired or wireless.

[0026] The BSs 105 can communicate wirelessly with the UEs 110. Each of the BSs 105 can provide communication coverage for a respective geographic coverage area 130. There may be overlapping geographic coverage areas 130. For example, a small cell 105' may have a coverage area 130' that overlaps with the coverage area 130 of one or more macro BSs 105. A network including both small cells and macro cells may be known as a heterogeneous network. A heterogeneous network may also include a Home Evolved Node B (eNB) (HeNB) that can serve a closed group known as a closed subscriber group (CSG). The communication link 120 between the BSs 105 and the UE 110 may include uplink (UL) (also referred to as reverse link) transmissions from the UE 110 to the BSs 105 and / or downlink (DL) (also referred to as forward link) transmissions from the BSs 105 to the UE 110. The communication link 120 may use multiple-input multiple-output (MIMO) antenna techniques, including spatial multiplexing, beamforming, and / or transmit diversity. The communication link may be over one or more carriers. The BS 105 / UE 110 may use a total of Y carriers used for transmission in each direction. xA UE may use spectrum with a bandwidth of up to Y MHz per carrier (e.g., 5, 10, 15, 20, 100, 400 MHz, etc.) allocated in carrier aggregation of up to MHz (x component carriers). The carriers may or may not be adjacent to each other. The carrier allocation may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated to DL than UL). The component carriers may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell), and the secondary component carrier may be referred to as a secondary cell (SCell).

[0027] Several UEs 110 may communicate with each other using device-to-device (D2D) communication links 158. The D2D communication links 158 may use the DL / UL WWAN spectrum. The D2D communication links 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). The D2D communication may be through various wireless D2D communication systems, such as FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.

[0028] The wireless communication system may further include a Wi-Fi access point (AP) 150 communicating with a Wi-Fi station (STA) 152 via a communication link 154 in the 5 GHz unlicensed frequency spectrum. When communicating in the unlicensed frequency spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) prior to communicating to determine if a channel is available.

[0029] The small cell 105' may operate in licensed and / or unlicensed frequency spectrum. When operating in the unlicensed frequency spectrum, the small cell 105' may utilize NR and use the same 5 GHz unlicensed frequency spectrum used by the Wi-Fi AP 150. The small cell 105' utilizing NR in the unlicensed frequency spectrum may enhance coverage to and / or increase capacity of the access network.

[0030] The BS 105, whether a small cell 105' or a large cell (e.g., a macro base station), may include an eNB, a gNodeB (gNB), or other types of base station. Some base stations, such as the gNB 180, may operate within one or more frequency bands within the electromagnetic spectrum. The electromagnetic spectrum is often subdivided into various classes, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating bands have been identified, designated frequency ranges FR1 (410 MHz to 7.125 GHz) and FR2 (24.25 GHz to 52.6 GHz). Frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as the "sub-6 GHz" band in various documents and papers. Similar nomenclature issues can arise with FR2, which is often referred to (interchangeably) as the "mmWave" band in documents and papers, even though it is different from the extremely high frequency (EHF) band (30 GHz to 300 GHz) identified by the International Telecommunications Union (ITU) as the "millimeter wave" (mmW) band.

[0031] With the above aspects in mind, it should be understood that, unless otherwise specified, terms such as “sub-6 GHz,” when used herein, may broadly refer to frequencies that may be below 6 GHz, may be within FR1, or may include mid-band frequencies. Furthermore, it should be understood that, unless otherwise specified, terms such as “millimeter wave,” when used herein, may broadly refer to frequencies that may include mid-band frequencies, may be within FR2, or may be within the EHF band. Communications using mmW / quasi-mmW radio frequency bands have extremely high path loss and short distances. The mmW base station 180 may use beamforming 182 with the UE 110 to compensate for the path loss and short distances.

[0032] The EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Mobility Management Entity (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172. The MME 162 may be in communication with a Home Subscriber Server (HSS) 174. The MME 162 is a control node that handles signaling between the UE 110 and the EPC 160. Generally, the MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are forwarded through the Serving Gateway 166, which is itself connected to the PDN Gateway 172. The PDN Gateway 172 provides UE IP address allocation and other functions. The PDN Gateway 172 and the BM-SC 170 are connected to an IP service 176. The IP services 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), packet switched (PS) streaming services, and / or other IP services. The BM-SC 170 may provide functionality for MBMS user service provisioning and delivery. The BM-SC 170 may serve as an entry point for content provider MBMS transmissions, may be used to authorize and initiate MBMS bearer services within the public land mobile network (PLMN), and may be used to schedule MBMS transmissions.The MBMS gateway 168 may be used to deliver MBMS traffic to BSs 105 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area that broadcasts a particular service, and may be responsible for session management (start / stop) and collecting eMBMS-related charging information.

[0033] The 5GC 190 may include an Access and Mobility Management Function (AMF) 192, other AMFs 193, a Session Management Function (SMF) 194, and a User Plane Function (UPF) 195. The AMF 192 may be in communication with a Unified Data Management (UDM) 196. The AMF 192 is a control node that handles signaling between the UE 110 and the 5GC 190. Generally, the AMF 192 provides QoS flow and session management. All user Internet Protocol (IP) packets are forwarded through the UPF 195. The UPF 195 provides UE IP address allocation and other functions. The UPF 195 is connected to IP services 197. The IP services 197 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), PS streaming services, and / or other IP services.

[0034] The BS 105 may also be referred to as a gNB, Node B, evolved Node B (eNB), access point, base transceiver station, radio base station, access node, radio transceiver, eNodeB (eNB), Home Node B, Home eNodeB, relay, transceiver function, basic service set (BSS), extended service set (ESS), transmit reception point (TRP), or some other suitable terminology. The base station 105 provides an access point to the UE 110 for the EPC 160 or 5GC 190. Examples of UE 110 include a mobile phone, a smartphone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small cooking appliance, a health management device, an implant, a sensor / actuator, a display, or any other similarly functional device. Some of the UEs 110 may be referred to as IoT devices (e.g., a parking meter, a gas pump, a toaster, a vehicle, a heart monitor, etc.). UE 110 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.

[0035] 2, an example implementation of the UE 110 may include a modem 220 having a communication component 222 and / or a coherence component 224. In one implementation, the UE 110 may include the communication component 222 configured to communicate with the BS 105 via a cellular network, a Wi-Fi network, or other wireless and wired networks. The UE 110 may include the coherence component 224 configured to determine coherence of one or more frequencies, frequency combinations, bands, and / or switches.

[0036] In some implementations, the UE 110 may include various components, including one or more processors 212, memory 216, and transceivers 202 in communication via one or more buses 244, which may operate in conjunction with a modem 220 and communications components 222 to enable one or more of the functions described herein related to communications with the BS 105. Additionally, the one or more processors 212, modems 220, memory 216, transceivers 202, radio frequency (RF) front end 288, and one or more antennas 265 may be configured to support voice and / or data calls (simultaneously or non-simultaneously) over one or more radio access technologies. The one or more antennas 265 may include one or more antennas, antenna elements, and / or antenna arrays.

[0037] In certain aspects, the one or more processors 212 may include a modem 220 using one or more modem processors. Various functions related to the communications component 222 and / or the coherence component 224 may be included in the modem 220 and / or the processor 212, and in certain aspects may be performed by a single processor, while in other aspects different ones of the functions may be performed by a combination of two or more different processors. For example, in certain aspects, the one or more processors 212 may include any one of a modem processor, or a baseband processor, or a digital signal processor, or a transmit processor, or a receive device processor, or a transceiver processor associated with the transceiver 202, or any combination thereof. Additionally, the modem 220 together with the processor 212 may comprise the UE 110. In other aspects, some of the features of the one or more processors 212 and / or the modem 220 associated with the communications component 222 may be implemented by the transceiver 202.

[0038] The memory 216 may be configured to store local versions of the data and / or applications 275 used. The memory 216 may also be configured to store local versions of the data and / or communication component 222 and / or coherence component 224 used herein, and / or one or more of the subcomponents executed by the at least one processor 212. The memory 216 may include any type of computer-readable medium usable by the computer or at least one processor 212, such as random access memory (RAM), read-only memory (ROM), tape, magnetic disk, optical disk, volatile memory, non-volatile memory, and any combination thereof. In an aspect, for example, the memory 216 may be a non-transitory computer-readable storage medium that stores one or more computer-executable codes defining the communication components 222 and / or the coherence components 224 and / or one or more of the sub-components and / or data associated therewith when the UE 110 operates the at least one processor 212 to execute the communication components 222 and / or the coherence components 224 and / or one or more of the sub-components.

[0039] The transceiver 202 may include at least one receiver 206 and at least one transmitter 208. The receiver 206 may include hardware, firmware, and / or software code executable by a processor to receive data, where the code comprises instructions and is stored in a memory (e.g., a computer-readable medium). The receiver 206 may be, for example, an RF receiving device. In an aspect, the receiver 206 may receive signals transmitted by at least one BS 105. The transmitter 208 may include hardware, firmware, and / or software code executable by a processor to transmit data, where the code comprises instructions and is stored in a memory (e.g., a computer-readable medium). A suitable example of the transmitter 208 may include, but is not limited to, an RF transmitter.

[0040] Moreover, in an aspect, the UE 110 may include an RF front end 288 that may be operatively in communication with one or more antennas 265 and a transceiver 202 for receiving and transmitting radio transmissions, e.g., wireless communications transmitted by at least one BS 105 or wireless transmissions transmitted by the UE 110. The RF front end 288 may be coupled to the one or more antennas 265 and may include one or more low-noise amplifiers (LNAs) 290, one or more switches 292, one or more power amplifiers (PAs) 298, and one or more filters 296 for transmitting and receiving RF signals.

[0041] In some embodiments, the LNAs 290 may amplify the received signal at a desired power level. In some embodiments, each LNA 290 may have a specified minimum and maximum gain value. In some embodiments, the RF front end 288 may use one or more switches 292 to select a particular LNA 290 and its specified gain value based on the desired gain value of a particular application.

[0042] Additionally, for example, one or more PAs 298 may be used by the RF front end 288 to amplify the RF output signal to a desired output power level. In an embodiment, each PA 298 may have a specified minimum and maximum gain value. In an embodiment, the RF front end 288 may use one or more switches 292 to select a particular PA 298 and its specified gain value based on the desired gain value of a particular application.

[0043] Also, for example, one or more filters 296 may be used by the RF front end 288 to filter a received signal to obtain an input RF signal. Similarly, in an aspect, for example, each filter 296 may be used to filter an output from a respective PA 298 to generate an output signal for transmission. In an aspect, each filter 296 may be coupled to a particular LNA 290 and / or PA 298. In an aspect, the RF front end 288 may use one or more switches 292 to select a transmit path or a receive path that uses a specified filter 296, LNA 290, and / or PA 298 based on a configuration as specified by the transceiver 202 and / or processor 212.

[0044] Accordingly, the transceiver 202 may be configured to transmit and receive wireless signals through one or more antennas 265 via the RF front end 288. In an aspect, the transceiver may be tuned to operate at a designated frequency so that the UE 110 may communicate with, for example, one or more BSs 105, or one or more cells associated with the one or more BSs 105. In an aspect, for example, the modem 220 may configure the transceiver 202 to operate at a designated frequency and power level based on the UE configuration of the UE 110 and the communication protocol used by the modem 220.

[0045] In an aspect, the modem 220 may be a multi-band multi-mode modem that may process digital data and communicate with the transceiver 202 so that the digital data is sent and received using the transceiver 202. In an aspect, the modem 220 may be multi-band and configured to support multiple frequency bands for a particular communication protocol. In an aspect, the modem 220 may be multi-mode and configured to support multiple operating networks and communication protocols. In an aspect, the modem 220 may control one or more components of the UE 110 (e.g., the RF front end 288, the transceiver 202) to enable transmission and / or reception of signals from a network based on a specified modem configuration. In an aspect, the modem configuration may be based on the mode of the modem and the frequency band in use. In another aspect, the modem configuration may be based on UE configuration information associated with the UE 110 provided by the network.

[0046] 3 , an example implementation of the BS 105 may include a modem 320 having a communication component 322 and / or a determining component 324. In some implementations, the BS 105 may include the communication component 322 configured to communicate with the UE 110. The BS 105 may include the determining component 324 configured to determine a codebook for the UE 110.

[0047] In some implementations, the BS 105 may include various components, including components such as one or more processors 312, memory 316, and transceivers 302 in communication via one or more buses 344, which may operate in conjunction with a modem 320 and communications components 322 to enable one or more of the functions described herein related to communications with the UE 110. Additionally, the one or more processors 312, modems 320, memory 316, transceivers 302, RF front end 388, and one or more antennas 365 may be configured to support voice and / or data calls (concurrently or non-concurrently) over one or more radio access technologies.

[0048] In certain aspects, the one or more processors 312 may include a modem 320 using one or more modem processors. Various functions related to the communication component 322 and / or the determination component 324 may be included in the modem 320 and / or the processor 312, and in certain aspects may be performed by a single processor, while in other aspects different ones of the functions may be performed by a combination of two or more different processors. For example, in certain aspects, the one or more processors 312 may include any one of a modem processor, a baseband processor, a digital signal processor, a transmit processor, a receive device processor, or a transceiver processor associated with the transceiver 302, or any combination thereof. Furthermore, the modem 320 may constitute the BS 105 and the processor 312. In other aspects, some of the features of the one or more processors 312 and / or the modem 320 associated with the communication component 322 may be implemented by the transceiver 302.

[0049] The memory 316 may be configured to store a local version of the data and / or applications 375 used herein. The memory 316 may also be configured to store a local version of the data and / or communication component 322 and / or determination component 324 used herein, and / or one or more of the subcomponents executed by the at least one processor 312. The memory 316 may include any type of computer-readable medium usable by the computer or at least one processor 312, such as random access memory (RAM), read-only memory (ROM), tape, magnetic disk, optical disk, volatile memory, non-volatile memory, and any combination thereof. In an aspect, for example, memory 316 may be a non-transitory computer-readable storage medium that stores one or more computer-executable codes defining communication component 322 and / or determination component 324 and / or one or more of subcomponents, and / or data associated therewith, when BS 105 operates at least one processor 312 to execute communication component 322 and / or determination component 324 and / or one or more of subcomponents.

[0050] The transceiver 302 may include at least one receiver 306 and at least one transmitter 308. The at least one receiver 306 may include hardware, firmware, and / or software code executable by a processor to receive data, where the code comprises instructions and is stored in a memory (e.g., a computer-readable medium). The receiver 306 may be, for example, an RF receiving device. In an aspect, the receiver 306 may receive signals transmitted by the UE 110. The transmitter 308 may include hardware, firmware, and / or software code executable by a processor to transmit data, where the code comprises instructions and is stored in a memory (e.g., a computer-readable medium). A suitable example of the transmitter 308 may include, but is not limited to, an RF transmitter.

[0051] Additionally, in an aspect, the BS 105 may include an RF front end 388 that may be in operative communication with one or more antennas 365 and a transceiver 302 for receiving and transmitting wireless transmissions, e.g., wireless communications transmitted by other BSs 105 or wireless transmissions transmitted by the UE 110. The RF front end 388 may be coupled to the 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.

[0052] In an embodiment, the LNAs 390 may amplify the received signal at a desired power level. In an embodiment, each LNA 390 may have a specified minimum and maximum gain value. In an embodiment, the RF front end 388 may 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.

[0053] Additionally, one or more PAs 398, for example, may be used by the RF front end 388 to amplify the RF output signal at a desired output power level. In an aspect, each PA 398 may have a specified minimum and maximum gain value. In an 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 of a particular application.

[0054] Also, for example, one or more filters 396 may be used by the RF front end 388 to filter a received signal to obtain an input RF signal. Similarly, in an aspect, for example, each filter 396 may be used to filter an output from a respective PA 398 to generate an output signal for transmission. In an aspect, each filter 396 may be coupled to a particular LNA 390 and / or PA 398. In an aspect, the RF front end 388 may use one or more switches 392 to select a transmit path or a receive path that uses a specified filter 396, LNA 390, and / or PA 398 based on a configuration as specified by the transceiver 302 and / or processor 312.

[0055] Thus, the transceiver 302 may be configured to transmit and receive wireless signals through one or more antennas 365 via the RF front end 388. In an aspect, the transceiver may be tuned to operate at a designated frequency so that the BS 105 may communicate with, for example, the UE 110, or one or more cells associated with one or more BSs 105. In an aspect, for example, the modem 320 may configure the transceiver 302 to operate at a designated frequency and power level based on the BS configuration of the base station 105 and the communication protocol used by the modem 320.

[0056] In an aspect, the modem 320 may be a multi-band, multi-mode modem that may process digital data and communicate with the transceiver 302 so that the digital data is sent and received using the transceiver 302. In an aspect, the modem 320 may be multi-band and configured to support multiple frequency bands for a particular communication protocol. In an aspect, the modem 320 may be multi-mode and configured to support multiple operating networks and communication protocols. In an aspect, the modem 320 may control one or more components of the BS 105 (e.g., the RF front end 388, the transceiver 302) to enable transmission and / or reception of signals from a network based on a specified modem configuration. In an aspect, the modem configuration may be based on the modem's mode and the frequency band in use. In another aspect, the modem configuration may be based on a base station configuration associated with the BS 105.

[0057] FIG. 4 shows an example of a diagram illustrating coherence capability reporting by a UE. Diagram 400 may show a capability message 402 transmitted by the UE 110 to the BS 105 for UL coherent transmission. In some implementations, the UE 110 may include a first UL TX chain 450 and a second UL TX chain 410. Other numbers of UL TX chains, such as more UL TX chains, may be used by the UE 110 for UL transmission. The first DAC 412 may convert a digital signal (e.g., bits and / or codewords) to an analog signal (e.g., symbols). The mixer 414 may combine the analog signal with a local oscillator signal from the first local oscillator 416 to produce a combined signal. The mixer 414 may output the combined signal to the first RF resource 424 or the second RF resource 426 through the switch 418. Whether the combined signal is output to the first RF resource 424 or the second RF resource 426 may depend on the position of the switch 418. When the switch 418 is in the first position 420, the combined signal may be output to the first RF resource 424. When the switch 418 is in the second position 422, the combined signal may be output to the second RF resource 426.

[0058] In some implementations, the second DAC 452 may convert the digital signal (e.g., bits and / or codewords) to an analog signal (e.g., symbols). The mixer 454 may combine the analog signal with a local oscillator signal from the first local oscillator 456 to produce a combined signal. The mixer 454 may output the combined signal to the third RF resource 458. The first RF resource 424, the second RF resource 426, and / or the third RF resource 458 may include power amplifiers, filters, antennas, antenna arrays, and / or other devices for transmitting RF signals at one or more frequencies and / or one or more frequency bands.

[0059] In some implementations, the first local oscillator 416 may implement a first phase locked loop (PLL). The second local oscillator 456 may implement a second PLL. In one aspect, the first local oscillator 416 and the second local oscillator 456 may be the same local oscillator. In another aspect, the first local oscillator 416 and the second local oscillator 456 may be different local oscillators.

[0060] In an aspect of the present disclosure, the UE 110 may receive UL scheduling information for transmitting UL information (e.g., UL data and / or UL control information). The UE 110 may schedule to transmit the UL information via the first UL TX chain 450 and / or the second UL TX chain 410. Prior to the UL transmission, the UE 110 may generate a capability message 402 indicating a first coherence capability of a first frequency RF TX-1 to be transmitted via the second RF resource 426 and / or the third RF resource 458. The capability message 402 may indicate a second coherence capability of a second frequency RF TX-2 to be transmitted via the first RF resource 424. The first coherence capability and / or the second coherence capability may be stored in the memory 216 of the UE 110. The first coherence capability and / or the second coherence capability may be determined during manufacturing and / or testing of the UE 110. Alternatively and / or additionally, the first coherence capability and / or the second coherence capability may be determined based on available RF resources (e.g., the second RF resource 426 and / or the third RF resource 458), the hardware of the UE 110, the processing capability of the UE 110, and / or other factors. Each of the first coherence capability and the second coherence capability may include a fully coherent transmission capability, a partially coherent transmission capability, and a non-coherent transmission capability. In other words, the UE 110 may be configured to transmit UL information using a coherent multiple-input multiple-output (MIMO) technique. The UE 110 may utilize the first RF resource 424, the second RF resource 426, and / or the third RF resource 458 to transmit UL information using a fully or partially coherent waveform in the first UL TX chain 450 and / or the second UL TX chain 410.

[0061] In certain aspects of the present disclosure, the capability message 402 may indicate UL TX switching coherence capability. The UL TX switching coherence capability may indicate whether the switch will cause the second UL TX chain 410 to maintain or lose transmit coherence. If the switch will cause the second UL TX chain 410 to lose transmit coherence, the capability message 402 may so indicate. As a result, even if the UE 110 supports full and / or partial coherence on the first frequency RF TX-1 (as indicated by the first coherence capability), the loss of transmit coherence during the switch may mean that the UE 110 cannot support coherent transmission over the first frequency RF TX-1.

[0062] In some implementations, coherence capability may indicate that the UE can transmit uplink information using coherent MIMO techniques. Coherence capability associated with a frequency may indicate whether the UE is configured to transmit uplink information using two or more beams at that frequency that are fully phase-locked, partially phase-locked, or not phase-locked. Coherence capability associated with UL TX switching may indicate that a UL TX chain can maintain coherency (with another UL TX chain) after switching from one frequency to a different frequency. UL TX switching may be determined, at least in part, by whether the phase-locked loop of the UL TX chain can recover coherency when subjected to jitter.

[0063] For example, if a UE cannot transmit uplink information using coherent MIMO techniques on a certain frequency, the coherence capability of that frequency may be designated as noncoherent. As a result, the UE may use only noncoherent codebooks for UL transmissions on that frequency. If a UE can transmit fully coherent uplink information, the coherence capability of that frequency may be designated as fully coherent. Thus, the UE may be able to use a noncoherent codebook, a partially coherent codebook, or a fully coherent codebook for UL transmissions on that frequency.

[0064] For example, if a UE's UL TX chain is configured to recover coherency after switching from one frequency to another, the coherence capability of the UL TX chain may be indicated as fully coherent or partially coherent, depending on the phase and / or power error after the switch.

[0065] For coherent UL MIMO, there may be threshold differences between the measured relative power and threshold phase error between different antenna ports during any slot within a specified time window from the last transmitted sounding reference signal (SRS) on the same antenna port for UL transmission (i.e., using codebook or non-codebook) and that measured in that last SRS. For example, the threshold difference for relative power error may be 1 decibel (dB), 2 dB, 4 dB, 5 dB, or other values. The threshold difference for relative phase error may be 10 degrees, 20 degrees, 40 degrees, 50 degrees, or other values. The above threshold requirements may apply when the UL transmit power at each antenna port is greater than 0 dBm for SRS transmission and for the duration of the time window (e.g., 20 milliseconds). In some cases, the above threshold requirement may require one or more of the following conditions: the UE is not signaled a change in the number of SRS ports in the SRS configuration or a change in the physical uplink shared channel (PUSCH) configuration; the UE remains in discontinuous reception (DRX) active time (e.g., the UE does not enter DRX off time); measurement gaps do not occur; no instances of SRS transmission with used antenna switching occur or the UE is configured with UL TX switching; the active bandwidth part (BWP) remains the same; the Evolved-Universal Terrestrial Radio Access-New Radio dual connectivity (EN-DC) and / or carrier aggregation (CA) configuration does not change for the UE (i.e., the UE is not configured with a primary-secondary cell or a secondary cell, or is deconfigured).

[0066] In some aspects of the present disclosure, UE 110 may transmit a capability message 402 to BS 105 including a first coherence capability of a first frequency RF TX-1, a second coherence capability of a second frequency RF TX-2, and / or an UL TX switching coherence capability. BS 105 may receive the capability message 402 and transmit a configuration message 404 to UE 110 indicating a fully coherent codebook, a partially coherent codebook, or a non-coherent codebook. In response to receiving the configuration message, UE 110 may transmit UL information with the corresponding codebook indicated in the configuration message.

[0067] In some implementations, the UE 110 may transmit the capability message 402 via a radio resource control (RRC) message. For example, part or all of the capability message 402 may be transmitted via one or more of the following signals: pusch-TransCoherence, pusch-TransCoherence_TXSwitching_band_comb_1, pusch-TransCoherence_TXSwitching_band_comb_2,... pusch-TransCoherence_TXSwitching_band_comb_n.

[0068] where n is a positive integer indicating the number of possible band combinations for UL TX switching.

[0069] In some instances, if the configuration message 404 indicates a fully coherent codebook, the UE 110 may use a fully coherent codebook, a partially coherent codebook, and / or a noncoherent codebook to transmit the UL information. If the configuration message 404 indicates a partially coherent codebook, the UE 110 may use a partially coherent codebook and / or a noncoherent codebook to transmit the UL information. If the configuration message 404 indicates a noncoherent codebook, the UE 110 may use a noncoherent codebook to transmit the UL information.

[0070] In a first example, the first frequency RF TX-1 and the second frequency RF TX-2 may not be configured for fully coherent or partially coherent UL transmission. The UE 110 may be scheduled to switch from the first frequency RF TX-1 to the second frequency RF TX-2 in the second UL TX chain 410. The UE 110 may report the first coherent capability and the second coherent capability (along with the UL TX switching coherence capability) to the BS 105 in a capability message 402. Regardless of the UL TX switching coherence capability, the BS 105 may transmit a configuration message 404 indicating a non-coherent codebook for the UE 110 to transmit UL information, because neither the first frequency RF TX-1 nor the second frequency RF TX-2 is configured for fully coherent or partially coherent UL transmission.

[0071] In a second example according to aspects of the present disclosure, the first local oscillator 416 and the second local oscillator 456 may be the same local oscillator. That is, the same local oscillator may output signals to both the first mixer 414 and the second mixer 454. The first frequency RF TX-1 and the second frequency RF TX-2 may be configured for fully coherent UL transmission and partially coherent UL transmission. The UE 110 may report the first coherent capability and the second coherent capability to the BS 105 in the capability message 402. The UE 110 may be scheduled to switch from the first frequency RF TX-1 to the second frequency RF TX-2 and / or from the second frequency RF TX-2 to the first frequency RF TX-1 in the second UL TX chain 410. Due to the switching, coherent transmission via the first frequency RF TX-1 on the second UL TX chain 410 may lose coherence because the same local oscillator signal is sent to both the first mixer 414 and the second mixer 454. Any jitter caused by the switch 418 switching between the first position 420 and the second position 422 may only affect the first mixer 414 and not the second mixer 454. As a result, the UE 110 may transmit a capability message 402 including a UL TX switching coherence capability indicating that the switching process will not maintain coherence. Based on the capability message 402, the BS 105 may transmit a configuration message 404 indicating a non-coherent codebook for the UE 110 to transmit UL information.

[0072] In a third example according to aspects of the present disclosure, the first local oscillator 416 and the second local oscillator 456 may be different oscillators. That is, the first local oscillator 416 may output a signal to the first mixer 414, and the second local oscillator 456 may output a signal to the second mixer 454 independently. The first frequency RF TX-1 and the second frequency RF TX-2 may be configured for fully coherent and partially coherent UL transmissions. The UE 110 may report the first and second coherent capabilities to the BS 105 in the capability message 402. The UE 110 may be scheduled to switch from the first frequency RF TX-1 to the second frequency RF TX-2 and / or from the second frequency RF TX-2 to the first frequency RF TX-1 in the second UL TX chain 410. After switching from the second frequency RF TX-2 to the first frequency RF TX-1, the first PLL may regain coherence because the first PLL is configured to output a signal that is independent of the second PLL. As a result, the UE 110 may transmit a capability message 402 including a UL TX switching coherence capability indicating that the switching process maintains coherence. Based on the capability message 402, the BS 105 may transmit a configuration message 404 indicating a fully coherent codebook or a partially coherent codebook for the UE 110 to transmit UL information.

[0073] 5 shows an example of a method for reporting coherence capabilities. For example, the method 500 may be performed by one or more of the processor 212, the memory 216, the application 275, the modem 220, the transceiver 202, the receiver 206, the transmitter 208, the RF front end 288, the communication component 222 and / or the coherence component 224, and / or one or more other components of the UE 110 in the wireless communication network 100.

[0074] At block 505, the method 500 may generate a capability message indicating a first coherence capability of the first frequency, a second coherence capability of the second frequency, and an uplink (UL) transmit (TX) switching coherence capability. For example, the coherence component 224, the processor 212, the memory 216, and / or the application 275 of the UE 110 may generate the capability message indicating the first coherence capability of the first frequency, the second coherence capability of the second frequency, and the uplink (UL) transmit (TX) switching coherence capability, as described above.

[0075] In some implementations, the coherence component 224, the processor 212, the memory 216, and / or the application 275 may be configured to and / or may define means for generating a capability message indicating a first coherence capability for a first frequency, a second coherence capability for a second frequency, and an uplink (UL) transmit (TX) switching coherence capability.

[0076] At block 510, the method 500 may transmit a capability message to the base station. For example, the communication component 222, the transceiver 202, the receiver 206, the transmitter 208, the RF front end 288, subcomponents of the RF front end 288, the processor 212, the memory 216, the modem 220, and / or the application 275 of the UE 110 may transmit the capability message to the base station. The communication component 222 may send a digital signal to the transceiver 202 or the transmitter 208. The transceiver 202 or the transmitter 208 may convert the digital signal to an electrical signal and send it to the RF front end 288. The RF front end 288 may filter and / or amplify the electrical signal. The RF front end 288 may send the electrical signal as an electromagnetic signal via one or more antennas 265.

[0077] In some implementations, the communications component 222, the transceiver 202, the receiver 206, the transmitter 208, the RF front end 288, subcomponents of the RF front end 288, the processor 212, the memory 216, the modem 220, and / or the application 275 may be configured to define and / or define means for transmitting a capability message to a base station.

[0078] At block 515, the method 500 may receive uplink (UL) scheduling information for transmitting first UL data using a first frequency and second UL data using a second frequency. For example, the communication component 222, transceiver 202, receiver 206, transmitter 208, RF front end 288, subcomponents of the RF front end 288, processor 212, memory 216, modem 220, and / or application 275 of the UE 110 may receive the uplink (UL) scheduling information for transmitting the first UL data using the first frequency and the second UL data using the second frequency, as described above. The RF front end 288 may receive an electrical signal converted from an electromagnetic signal. The RF front end 288 may filter and / or amplify the electrical signal. The transceiver 202 or receiver 206 may convert the electrical signal to a digital signal and send the digital signal to the communication component 222.

[0079] In some implementations, the communications component 222, the transceiver 202, the receiver 206, the transmitter 208, the RF front end 288, subcomponents of the RF front end 288, the processor 212, the memory 216, the modem 220, and / or the application 275 may be configured to and / or may define means for receiving uplink (UL) scheduling information for transmitting first UL data using a first frequency and second UL data using a second frequency.

[0080] At block 520, method 500 may transmit at least one of the first UL data or the second UL data based on the UL scheduling information and at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability. For example, communication component 222, transceiver 202, receiver 206, transmitter 208, RF front end 288, subcomponents of RF front end 288, processor 212, memory 216, modem 220, and / or application 275 of UE 110 may transmit at least one of the first UL data or the second UL data based on the UL scheduling information and at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability. Communication component 222 may send a digital signal to transceiver 202 or transmitter 208. The transceiver 202 or transmitter 208 may convert the digital signals to electrical signals and send them to the RF front end 288. The RF front end 288 may filter and / or amplify the electrical signals. The RF front end 288 may send the electrical signals as electromagnetic signals via one or more antennas 265.

[0081] In some implementations, the communications component 222, the transceiver 202, the receiver 206, the transmitter 208, the RF front end 288, subcomponents of the RF front end 288, the processor 212, the memory 216, the modem 220, and / or the application 275 may be configured to define and / or define means for transmitting at least one of the first UL data or the second UL data based on the UL scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability. For example, depending on the scheduling information received from the base station 105, the UE 110 may transmit only the first UL data, only the second UL data, or both the first UL data and the second UL data simultaneously.

[0082] Alternatively or additionally, method 500 may further include any of the methods described above, further including receiving, in response to the capability message, from the base station, a configuration message indicating a non-coherent codebook for transmitting at least one of the first UL data or the second UL data, wherein the transmitting step includes transmitting at least one of the first UL data or the second UL data using the non-coherent codebook. Communications component 222, transceiver 202, receiver 206, transmitter 208, RF front end 288, subcomponents of RF front end 288, processor 212, memory 216, modem 220, and / or application 275 may be configured to and / or define means for receiving, in response to the capability message, from the base station, a configuration message indicating a non-coherent codebook for transmitting at least one of the first UL data or the second UL data, wherein the transmitting step includes transmitting at least one of the first UL data or the second UL data using the non-coherent codebook.

[0083] Alternatively or additionally, method 500 may further include any of the methods described above, further including receiving, in response to the capability message, from a base station, a configuration message indicating a fully coherent codebook for transmitting at least one of the first UL data or the second UL data, wherein the transmitting step includes transmitting at least one of the first UL data or the second UL data using the fully coherent codebook. Communications component 222, transceiver 202, receiver 206, transmitter 208, RF front end 288, subcomponents of RF front end 288, processor 212, memory 216, modem 220, and / or application 275 may be configured to and / or define means for receiving, in response to the capability message, from a base station, a configuration message indicating a fully coherent codebook for transmitting at least one of the first UL data or the second UL data, wherein the transmitting step includes transmitting at least one of the first UL data or the second UL data using the fully coherent codebook.

[0084] Alternatively or additionally, method 500 may further include any of the methods described above, and further includes receiving, in response to the capability message, a configuration message from the base station indicating a partially coherent codebook for transmitting at least one of the first UL data or the second UL data, wherein the transmitting step includes transmitting at least one of the first UL data or the second UL data using the partially coherent codebook. The communications component 222, the transceiver 202, the receiver 206, the transmitter 208, the RF front end 288, subcomponents of the RF front end 288, the processor 212, the memory 216, the modem 220, and / or the application 275 may be configured to define and / or define means for receiving, in response to the capability message, a configuration message from the base station indicating a partially coherent codebook for transmitting at least one of the first UL data or the second UL data, wherein the transmitting step includes transmitting at least one of the first UL data or the second UL data using the partially coherent codebook.

[0085] Alternatively or additionally, method 500 may further include any of the methods described above, wherein each of the first coherence capability, the second coherence capability, and the UL TX switching coherence capability includes a fully coherent transmission capability, a partially coherent transmission capability, or a non-coherent transmission capability.

[0086] Alternatively or additionally, the method 500 may further include any of the methods described above, wherein the non-coherent transmission capability is a default mode transmission capability.

[0087] Alternatively or additionally, the method 500 may further include any of the methods described above, wherein the first frequency comprises a first plurality of frequencies, or the second frequency comprises a second plurality of frequencies.

[0088] Alternatively or additionally, method 500 may further include any of the methods described above, further including configuring the first UL TX chain 450 to transmit the first UL data using a first frequency; and configuring the second UL TX chain 410 to transmit the first UL data using the first frequency and the second UL data using the second frequency, and switching from the first scheduled transmission of the first UL data to the second scheduled transmission of the second UL data or from the second scheduled transmission of the second UL data to the first scheduled transmission of the first UL data, wherein the switching maintains coherency within the second UL TX chain 410, and wherein the capability message indicates partial coherent transmission capability or full coherent transmission capability for the UL TX switching coherence capability. The coherence component 224, the processor 212, the memory 216, the modem 220, and / or the application 275 may be configured to define and / or define means for configuring the first UL TX chain 450 to transmit the first UL data using a first frequency, and for configuring the second UL TX chain 410 to transmit the first UL data using the first frequency and the second UL data using the second frequency, and for switching from the first scheduled transmission of the first UL data to the second scheduled transmission of the second UL data or from the second scheduled transmission of the second UL data to the first scheduled transmission of the first UL data, wherein the switching maintains coherency within the second UL TX chain 410, and wherein the capability message indicates partial coherent transmission capability or full coherent transmission capability for the UL TX switching coherence capability.

[0089] Alternatively or additionally, method 500 may further include any of the methods described above, further including configuring the first UL TX chain 450 to transmit the first UL data using a first frequency; and configuring the second UL TX chain 410 to transmit the first UL data using the first frequency and the second UL data using a second frequency, and switching from the first scheduled transmission of the first UL data to the second scheduled transmission of the second UL data or from the second scheduled transmission of the second UL data to the first scheduled transmission of the first UL data, wherein the switching causes a loss of coherency within the second UL TX chain 410, and wherein the capability message indicates non-coherent transmission capability for the UL TX switching coherency capability. The coherence component 224, the processor 212, the memory 216, the modem 220, and / or the application 275 may be configured to define and / or define means for configuring the first UL TX chain 450 to transmit the first UL data using a first frequency, and for configuring the second UL TX chain 410 to transmit the first UL data using the first frequency and the second UL data using the second frequency, and for switching from the first scheduled transmission of the first UL data to the second scheduled transmission of the second UL data or from the second scheduled transmission of the second UL data to the first scheduled transmission of the first UL data, wherein the switching causes a loss of coherency within the second UL TX chain 410, and wherein the capability message indicates non-coherent transmission capability for the UL TX switching coherence capability.

[0090] Alternatively or additionally, method 500 may further include any of the methods described above, further including generating a UL TX switching capability indicating whether first UL TX chain 450 or second UL TX chain 410 is configured for UL TX switching and transmitting the UL TX switching capability to a base station. Coherence component 224, processor 212, memory 216, modem 220, and / or application 275 may be configured to and / or define means for generating a UL TX switching capability indicating whether first UL TX chain 450 or second UL TX chain 410 is configured for UL TX switching and transmitting the UL TX switching capability to a base station.

[0091] 6 illustrates an example of a method for indicating a coherence codebook. For example, the method 600 may be performed by one or more of the processor 312, the memory 316, the application 375, the modem 320, the transceiver 302, the receiver 306, the transmitter 308, the RF front end 388, the communication component 322 and / or the determining component 324, and / or one or more other components of the base station 105 in the wireless communication network 100.

[0092] At block 605, the method 600 may receive a capability message from a user equipment (UE) indicating a first coherence capability of a first frequency, a second coherence capability of a second frequency, and an uplink (UL) transmit (TX) switching coherence capability. For example, the determination component 324, processor 312, memory 316, and / or application 375 of the base station 105 may receive the capability message from the UE indicating the first coherence capability of the first frequency, the second coherence capability of the second frequency, and the uplink (UL) transmit (TX) switching coherence capability, as described above. The RF front end 388 may receive an electrical signal converted from an electromagnetic signal. The RF front end 388 may filter and / or amplify the electrical signal. The transceiver 302 or receiver 306 may convert the electrical signal to a digital signal and send the digital signal to the communication component 322 and / or the determination component 324.

[0093] In some implementations, the determining component 324, the processor 312, the memory 316, and / or the application 375 may be configured to define and / or may define means for receiving, from the UE, a capability message indicating a first coherence capability for a first frequency, a second coherence capability for a second frequency, and an uplink (UL) transmit (TX) switching coherence capability.

[0094] At block 610, the method 600 may transmit UL scheduling information to the UE for transmitting, by the UE, the first UL data using the first frequency and the second UL data using the second frequency. For example, the communication component 322, the transceiver 302, the receiver 306, the transmitter 308, the RF front end 388, subcomponents of the RF front end 388, the processor 312, the memory 316, the modem 320, and / or the application 375 of the base station 105 may transmit, to the UE, the UL scheduling information for transmitting, by the UE, the first UL data using the first frequency and the second UL data using the second frequency, as described above. The communication component 322 may send a digital signal to the transceiver 302 or the transmitter 308. The transceiver 302 or the transmitter 308 may convert the digital signal to an electrical signal and send it to the RF front end 388. The RF front end 388 may filter and / or amplify the electrical signal. The RF front end 388 may send the electrical signals as electromagnetic signals via one or more antennas 365 .

[0095] In some implementations, the communications component 322, the transceiver 302, the receiver 306, the transmitter 308, the RF front end 388, subcomponents of the RF front end 388, the processor 312, the memory 316, the modem 320, and / or the application 375 may be configured to define and / or define means for transmitting, to the UE, UL scheduling information for transmitting, by the UE, first UL data using a first frequency and second UL data using a second frequency.

[0096] At block 615, the method 600 may receive at least one of the first UL data or the second UL data from the UE based on the scheduling information and at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability. For example, the communication component 322, the transceiver 302, the receiver 306, the transmitter 308, the RF front end 388, subcomponents of the RF front end 388, the processor 312, the memory 316, the modem 320, and / or the application 375 of the base station 105 may receive at least one of the first UL data or the second UL data from the UE based on the scheduling information and at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability. The RF front end 388 may receive an electrical signal converted from an electromagnetic signal. The RF front end 388 may filter and / or amplify the electrical signal. The transceiver 302 or receiver 306 may convert the electrical signal to a digital signal and send the digital signal to the communication component 322 and / or the determination component 324 .

[0097] In some implementations, the determining component 324, the processor 312, the memory 316, and / or the application 375 may be configured to and / or may define means for receiving at least one of the first UL data or the second UL data from the UE based on the scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability. For example, depending on the scheduling information transmitted to the UE 110, the base station 105 may receive only the first UL data, only the second UL data, or both the first UL data and the second UL data simultaneously.

[0098] Alternatively or additionally, the method 600 may further include transmitting a configuration message to the UE in response to the capability message, the configuration message indicating a non-coherent codebook for transmitting at least one of the first UL data or the second UL data. For example, the communication component 322, the transceiver 302, the receiver 306, the transmitter 308, the RF front end 388, subcomponents of the RF front end 388, the processor 312, the memory 316, the modem 320, and / or the application 375 of the base station 105 may transmit a configuration message to the UE in response to the capability message, the configuration message indicating a non-coherent codebook for transmitting at least one of the first UL data or the second UL data, as described above. The communication component 322 may send a digital signal to the transceiver 302 or the transmitter 308. The transceiver 302 or the transmitter 308 may convert the digital signal to an electrical signal and send it to the RF front end 388. The RF front end 388 may filter and / or amplify the electrical signal. The RF front end 388 may send the electrical signals as electromagnetic signals via one or more antennas 365 .

[0099] In some implementations, the communications component 322, the transceiver 302, the receiver 306, the transmitter 308, the RF front end 388, subcomponents of the RF front end 388, the processor 312, the memory 316, the modem 320, and / or the application 375 may be configured to define and / or define means for transmitting, in response to the capabilities message, a configuration message to the UE indicating a non-coherent codebook for transmitting at least one of the first UL data or the second UL data.

[0100] Alternatively or additionally, the method 600 may include receiving at least one of the first UL data or the second UL data using a non-coherent codebook. For example, the determination component 324, the processor 312, the memory 316, and / or the application 375 of the base station 105 may receive at least one of the first UL data or the second UL data using a non-coherent codebook, as described above. The RF front end 388 may receive an electrical signal converted from an electromagnetic signal. The RF front end 388 may filter and / or amplify the electrical signal. The transceiver 302 or the receiver 306 may convert the electrical signal to a digital signal and send the digital signal to the communication component 322 and / or the determination component 324.

[0101] In some implementations, the determining component 324, the processor 312, the memory 316, and / or the application 375 may be configured to and / or may define means for receiving at least one of the first UL data or the second UL data using a non-coherent codebook.

[0102] Alternatively or additionally, the method 600 may further include transmitting, in response to the capability message, a configuration message to the UE indicating a complete coherent codebook for transmitting at least one of the first UL data or the second UL data. For example, the communication component 322, the transceiver 302, the receiver 306, the transmitter 308, the RF front end 388, subcomponents of the RF front end 388, the processor 312, the memory 316, the modem 320, and / or the application 375 of the base station 105 may transmit, in response to the capability message, a configuration message to the UE indicating a complete coherent codebook for transmitting at least one of the first UL data or the second UL data, as described above. The communication component 322 may send a digital signal to the transceiver 302 or the transmitter 308. The transceiver 302 or the transmitter 308 may convert the digital signal to an electrical signal and send it to the RF front end 388. The RF front end 388 may filter and / or amplify the electrical signal. The RF front end 388 may send the electrical signals as electromagnetic signals via one or more antennas 365 .

[0103] In some implementations, the communications component 322, the transceiver 302, the receiver 306, the transmitter 308, the RF front end 388, subcomponents of the RF front end 388, the processor 312, the memory 316, the modem 320, and / or the application 375 may be configured to define and / or define means for transmitting, in response to the capability message, a configuration message to the UE indicating a full coherent codebook for transmitting at least one of the first UL data or the second UL data.

[0104] Alternatively or additionally, the method 600 may include receiving at least one of the first UL data or the second UL data using a fully coherent codebook. For example, the determination component 324, the processor 312, the memory 316, and / or the application 375 of the base station 105 may receive at least one of the first UL data or the second UL data using a fully coherent codebook, as described above. The RF front end 388 may receive an electrical signal converted from an electromagnetic signal. The RF front end 388 may filter and / or amplify the electrical signal. The transceiver 302 or the receiver 306 may convert the electrical signal to a digital signal and send the digital signal to the communication component 322 and / or the determination component 324.

[0105] In some implementations, the determining component 324, the processor 312, the memory 316, and / or the application 375 may be configured to and / or may define means for receiving at least one of the first UL data or the second UL data using a fully coherent codebook.

[0106] Alternatively or additionally, the method 600 may further include transmitting a configuration message to the UE in response to the capability message, the configuration message indicating a partially coherent codebook for transmitting at least one of the first UL data or the second UL data. For example, the communication component 322, the transceiver 302, the receiver 306, the transmitter 308, the RF front end 388, subcomponents of the RF front end 388, the processor 312, the memory 316, the modem 320, and / or the application 375 of the base station 105 may transmit a configuration message to the UE in response to the capability message, the configuration message indicating a partially coherent codebook for transmitting at least one of the first UL data or the second UL data, as described above. The communication component 322 may send a digital signal to the transceiver 302 or the transmitter 308. The transceiver 302 or the transmitter 308 may convert the digital signal to an electrical signal and send it to the RF front end 388. The RF front end 388 may filter and / or amplify the electrical signal. The RF front end 388 may send the electrical signals as electromagnetic signals via one or more antennas 365 .

[0107] In some implementations, the communications component 322, the transceiver 302, the receiver 306, the transmitter 308, the RF front end 388, subcomponents of the RF front end 388, the processor 312, the memory 316, the modem 320, and / or the application 375 may be configured to define and / or define means for transmitting, in response to the capabilities message, a configuration message to the UE indicating a partially coherent codebook for transmitting at least one of the first UL data or the second UL data.

[0108] Alternatively or additionally, the method 600 may include receiving at least one of the first UL data or the second UL data using a partially coherent codebook. For example, the determination component 324, the processor 312, the memory 316, and / or the application 375 of the base station 105 may receive at least one of the first UL data or the second UL data using a partially coherent codebook, as described above. The RF front end 388 may receive an electrical signal converted from an electromagnetic signal. The RF front end 388 may filter and / or amplify the electrical signal. The transceiver 302 or the receiver 306 may convert the electrical signal to a digital signal and send the digital signal to the communication component 322 and / or the determination component 324.

[0109] In some implementations, the determining component 324, the processor 312, the memory 316, and / or the application 375 may be configured to and / or may define means for receiving at least one of the first UL data or the second UL data using a partially coherent codebook.

[0110] In some implementations, the non-coherent transmission capability is a default mode transmission capability.

[0111] In some implementations, the first frequency comprises a first plurality of frequencies, or the second frequency comprises a second plurality of frequencies.

[0112] In some implementations, the first UL TX chain 450 of the UE 110 is configured to transmit first UL data using a first frequency, and the second UL TX chain 410 of the UE 110 is configured to transmit the first UL data using the first frequency and the second UL data using a second frequency, and to switch from a first scheduled transmission of the first UL data to a second scheduled transmission of the second UL data or from the second scheduled transmission of the second UL data to the first scheduled transmission of the first UL data, wherein the switching maintains coherency within the second UL TX chain 410, and the capability message indicates partial coherent transmission capability or full coherent transmission capability for the UL TX switching coherence capability.

[0113] In some implementations, the first UL TX chain 450 of the UE 110 is configured to transmit first UL data using a first frequency, and the second UL TX chain 410 of the UE 110 is configured to transmit the first UL data using the first frequency and the second UL data using a second frequency, and to switch from a first scheduled transmission of the first UL data to a second scheduled transmission of the second UL data or from the second scheduled transmission of the second UL data to the first scheduled transmission of the first UL data, wherein the switching causes a loss of coherency within the second UL TX chain 410, and the capability message indicates non-coherent transmission capability for the UL TX switching coherency capability.

[0114] Alternatively or additionally, the method 600 may include receiving a UL TX switching capability from the UE indicating whether the first UL TX chain or the second UL TX chain is configured for UL TX switching. For example, the determining component 324, the processor 312, the memory 316, and / or the application 375 of the base station 105 may receive the UL TX switching capability from the UE 110, indicating whether the first UL TX chain 450 or the second UL TX chain 410 is configured for UL TX switching, as described above. The RF front end 388 may receive an electrical signal converted from an electromagnetic signal. The RF front end 388 may filter and / or amplify the electrical signal. The transceiver 302 or the receiver 306 may convert the electrical signal to a digital signal and send the digital signal to the communication component 322 and / or the determining component 324.

[0115] In some implementations, the determining component 324, the processor 312, the memory 316, and / or the application 375 may be configured to and / or may define means for receiving from the UE a UL TX switching capability indicating whether the first UL TX chain 450 or the second UL TX chain 410 is configured for UL TX switching.

[0116] In some aspects, a user equipment (UE) includes a processor (e.g., one or more processors 212 of FIG. 2) and an interface (e.g., one or more buses 244 of FIG. 2), where the processor is configured to: generate a capability message indicating a first coherence capability of a first frequency, a second coherence capability of a second frequency, and an uplink (UL) transmit (TX) switching coherence capability; output the capability message for transmission to a base station via the interface; obtain UL scheduling information received from the base station via the interface for transmitting the first UL data using the first frequency and the second UL data using the second frequency; and output at least one of the first UL data or the second UL data via the interface for transmission to the base station based on the scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

[0117] In some aspects, the base station includes a processor (e.g., one or more processors 312 of FIG. 3 ) and an interface (e.g., one or more buses 344 of FIG. 3 ), where the processor is configured to: obtain, via the interface, a capability message received from a user equipment (UE) indicating a first coherence capability of a first frequency, a second coherence capability of a second frequency, and an uplink (UL) transmit (TX) switching coherence capability; output, via the interface, UL scheduling information for transmission by the UE of first UL data using the first frequency and second UL data using the second frequency for transmission to the UE; and obtain, via the interface, at least one of the first UL data or second UL data received from the UE based on the scheduling information and at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

[0118] Additional aspects Aspect 1: A method of wireless communication by a user equipment (UE) in a network, the method including: generating a capability message indicating a first coherence capability of a first frequency, a second coherence capability of a second frequency, and an uplink (UL) transmit (TX) switching coherence capability; transmitting the capability message to a base station; receiving UL scheduling information for transmitting first UL data using the first frequency and second UL data using the second frequency; and transmitting at least one of the first UL data or the second UL data based on the UL scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

[0119] Aspect 2: The method of aspect 1, further comprising: receiving, in response to the capability message, from the base station, a configuration message indicating a non-coherent codebook for transmitting at least one of the first UL data or the second UL data, wherein the transmitting step comprises transmitting at least one of the first UL data or the second UL data using the non-coherent codebook.

[0120] Aspect 3: The method of Aspect 1, further comprising: receiving, in response to the capability message, from the base station, a configuration message indicating a fully coherent codebook for transmitting at least one of the first UL data or the second UL data, wherein the transmitting step comprises transmitting at least one of the first UL data or the second UL data using the fully coherent codebook.

[0121] Aspect 4: The method of Aspect 1, further comprising: receiving, in response to the capability message, from the base station, a configuration message indicating a partially coherent codebook for transmitting at least one of the first UL data or the second UL data, wherein the transmitting step comprises transmitting at least one of the first UL data or the second UL data using the partially coherent codebook.

[0122] Aspect 5: The method of any one of Aspects 1 to 4, wherein each of the first coherence capability, the second coherence capability, and the UL TX switching coherence capability includes a fully coherent transmission capability, a partially coherent transmission capability, or a non-coherent transmission capability.

[0123] Aspect 6: The method of aspect 5, wherein the non-coherent transmission capability is a default mode transmission capability.

[0124] Embodiment 7: The method of any one of embodiments 1 to 6, wherein the first frequency comprises a first plurality of frequencies or the second frequency comprises a second plurality of frequencies.

[0125] Aspect 8: The method of any one of Aspects 1 to 7, further including: configuring a first UL TX chain to transmit first UL data using a first frequency; and configuring a second UL TX chain to transmit the first UL data using the first frequency and the second UL data using the second frequency, and switching from a first scheduled transmission of the first UL data to a second scheduled transmission of the second UL data or from the second scheduled transmission of the second UL data to the first scheduled transmission of the first UL data, wherein the switching maintains coherency in the second UL TX chain, and wherein the capability message indicates partial coherent transmission capability or full coherent transmission capability for the UL TX switching coherence capability.

[0126] Aspect 9: The method of any one of Aspects 1 to 7, further including: configuring a first UL TX chain to transmit first UL data using a first frequency; and configuring a second UL TX chain to transmit the first UL data using the first frequency and the second UL data using a second frequency, and to switch from a first scheduled transmission of the first UL data to a second scheduled transmission of the second UL data or from the second scheduled transmission of the second UL data to the first scheduled transmission of the first UL data, wherein the switching causes a loss of coherency in the second UL TX chain, and wherein the capability message indicates non-coherent transmission capability for the UL TX switching coherency capability.

[0127] Aspect 10: The method of any one of Aspects 1 to 9, further comprising: generating a UL TX switching capability indicating whether the first UL TX chain or the second UL TX chain is configured for UL TX switching; and transmitting the UL TX switching capability to the base station.

[0128] Aspect 11: A method of wireless communication by a base station, comprising: receiving from a user equipment (UE) a capability message indicating a first coherence capability of a first frequency, a second coherence capability of a second frequency, and an uplink (UL) transmit (TX) switching coherence capability; transmitting to the UE UL scheduling information for transmission by the UE of first UL data using the first frequency and second UL data using the second frequency; and receiving from the UE at least one of the first UL data or the second UL data based on the UL scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

[0129] Aspect 12: The method of aspect 11, further comprising: in response to the capability message, transmitting a configuration message to the UE indicating a non-coherent codebook for transmitting at least one of the first UL data or the second UL data, wherein receiving at least one of the first UL data or the second UL data comprises receiving at least one of the first UL data or the second UL using the non-coherent codebook.

[0130] Aspect 13: The method of aspect 11, further comprising: in response to the capability message, transmitting to the UE a configuration message indicating a fully coherent codebook for transmitting at least one of the first UL data or the second UL data; and wherein receiving at least one of the first UL data or the second UL data comprises receiving at least one of the first UL data or the second UL data using the fully coherent codebook.

[0131] Aspect 14: The method of aspect 11, further comprising: in response to the capability message, transmitting to the UE a configuration message indicating a partially coherent codebook for transmitting at least one of the first UL data or the second UL data, wherein receiving at least one of the first UL data or the second UL data comprises receiving at least one of the first UL data or the second UL data using the partially coherent codebook.

[0132] Aspect 15: The method of any one of aspects 11 to 14, wherein each of the first coherence capability, the second coherence capability, and the UL TX switching coherence capability includes a fully coherent transmission capability, a partially coherent transmission capability, or a non-coherent transmission capability.

[0133] Aspect 16: The method of aspect 15, wherein the non-coherent transmission capability is a default mode transmission capability.

[0134] Embodiment 17: The method of any one of embodiments 11 to 16, wherein the first frequency comprises a first plurality of frequencies, or the second frequency comprises a second plurality of frequencies.

[0135] Aspect 18: The method of any one of aspects 11 to 17, wherein a first UL TX chain of the UE is configured to transmit first UL data using a first frequency, and a second UL TX chain of the UE is configured to transmit the first UL data using the first frequency and transmit the second UL data using the second frequency, and to switch from a first scheduled transmission of the first UL data to a second scheduled transmission of the second UL data or from the second scheduled transmission of the second UL data to the first scheduled transmission of the first UL data, wherein the switching maintains coherency in the second UL TX chain, and wherein the capability message indicates partial coherent transmission capability or full coherent transmission capability for the UL TX switching coherence capability.

[0136] Aspect 19: The method of any one of aspects 11 to 17, wherein a first UL TX chain of the UE is configured to transmit first UL data using a first frequency, and a second UL TX chain of the UE is configured to transmit the first UL data using the first frequency and transmit the second UL data using the second frequency, and to switch from a first scheduled transmission of the first UL data to a second scheduled transmission of the second UL data or from the second scheduled transmission of the second UL data to the first scheduled transmission of the first UL data, wherein the switching causes a loss of coherency in the second UL TX chain, and wherein the capability message indicates non-coherent transmission capability for the UL TX switching coherency capability.

[0137] Aspect 20: The method of any one of aspects 11 to 19, further comprising receiving a UL TX switching capability from the UE indicating whether the first UL TX chain or the second UL TX chain is configured for UL TX switching.

[0138] Aspect 21: A user equipment (UE) comprising one or more processors together configured to perform the operations of one or more of aspects 1 to 10, a memory comprising instructions executable by the one or more processors, and a transceiver.

[0139] Aspect 22: A user equipment (UE) comprising means for performing one or more of the operations of aspects 1 to 10.

[0140] Aspect 23: A computer-readable medium for wireless communication comprising instructions executable by a user equipment (UE) to perform the operations of one or more of aspects 1 through 10.

[0141] Aspect 24: An apparatus for wireless communication by a user equipment, comprising: a memory comprising instructions; and one or more processors, wherein the one or more processors are configured to execute the instructions in the memory to: generate a capability message indicating a first coherence capability of a first frequency, a second coherence capability of a second frequency, and an uplink (UL) transmit (TX) switching coherence capability; output the capability message for transmission to a base station; obtain UL scheduling information for transmitting the first UL data using the first frequency and the second UL data using the second frequency; and output at least one of the first UL data or the second UL data for transmission to the base station based on the UL scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

[0142] Aspect 25: A base station comprising: one or more processors; a memory comprising instructions executable by the one or more processors; and a transceiver, together configured to perform the operations of one or more of aspects 11 to 20.

[0143] Aspect 26: A base station comprising means for performing the operations of one or more of aspects 11 to 20.

[0144] Aspect 27: A computer-readable medium for wireless communication comprising instructions executable by a base station to perform the operations of one or more of aspects 11 to 20.

[0145] Aspect 28: An apparatus for wireless communication by a base station, comprising: a memory comprising instructions; and one or more processors, wherein the one or more processors are configured to execute the instructions in the memory to: obtain a capability message received from a user equipment (UE) indicating a first coherence capability of a first frequency, a second coherence capability of a second frequency, and an uplink (UL) transmit (TX) switching coherence capability; output UL scheduling information for transmission by the UE of first UL data using the first frequency and second UL data using the second frequency for transmission to the UE; and obtain at least one of the first UL data or the second UL data received from the UE based on the UL scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

[0146] Aspect 29: A user equipment (UE) comprising a processor and an interface, wherein the processor is configured to: generate a capability message indicating a first coherence capability of a first frequency, a second coherence capability of a second frequency, and an uplink (UL) transmit (TX) switching coherence capability; output the capability message for transmission to a base station via the interface; obtain UL scheduling information received from the base station via the interface for transmitting first UL data using the first frequency and second UL data using the second frequency; and output at least one of the first UL data or the second UL data via the interface for transmission to the base station based on the scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

[0147] Aspect 30: A base station comprising a processor and an interface, wherein the processor is configured to: obtain, via the interface, a capability message received from a user equipment (UE) indicating a first coherence capability of a first frequency, a second coherence capability of a second frequency, and an uplink (UL) transmit (TX) switching coherence capability; output, via the interface, UL scheduling information for transmission by the UE of first UL data using the first frequency and second UL data using the second frequency for transmission to the UE; and obtain, via the interface, at least one of the first UL data or the second UL data received from the UE based on the scheduling information and on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

[0148] The detailed description set forth above with reference to the accompanying drawings describes examples and does not represent the only examples that may be implemented or fall within the scope of the claims. The term "exemplary," as used in this description, means "serving as an example, instance, or illustration," and does not mean "preferred" or "advantageous over other examples." The detailed description includes specific details for the purpose of providing an understanding of the described techniques. However, these techniques may be practiced without these specific details. For example, changes may be made in the function and arrangement of the described elements without departing from the scope of the disclosure. Also, various examples may omit, substitute, or add various procedures or components, as appropriate. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Also, features described with respect to some examples may be combined in other examples. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

[0149] It should be noted that the techniques described herein may be used for various wireless communication networks, such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, and other systems. The terms "system" and "network" are often used interchangeably. A CDMA system may implement radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), etc. CDMA2000 covers IS-2000, IS-95, and IS-856 standards. IS-2000 Releases 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. A TDMA system may implement a radio technology such as Global System for Mobile Communications (GSM). An OFDMA system may implement a radio technology such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM™, etc. UTRA and E-UTRA are parts of the Universal Mobile Telecommunications System (UMTS). 3GPP® LTE and LTE-Advanced (LTE-A) are new releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP).CDMA2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein may be used for the systems and radio technologies mentioned above, as well as other systems and radio technologies, including cellular (e.g., LTE) communications over shared radio frequency spectrum bands. However, while the description herein describes LTE / LTE-A or 5G systems by way of example, and LTE terminology is used in much of the description below, the techniques may be applicable to other next-generation communication systems.

[0150] Information and signals may be represented using any of a variety of different technologies and techniques. For example, the data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, computer-executable code or instructions stored on a computer-readable medium, or any combination thereof.

[0151] The various example blocks and components described in connection with this disclosure may be implemented or performed using specially programmed devices such as, but not limited to, a processor, a digital signal processor (DSP), an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A specially programmed processor may be a microprocessor, but alternatively, 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, e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0152] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or a combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over a non-transitory computer-readable medium as one or more instructions or code. Other examples and implementations are 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 software executed by a specially programmed processor, hardware, firmware, hardwiring, or any combination thereof. Features implementing the functions may also be physically located in various locations, including being distributed such that portions of the functions are implemented in different physical locations. Also, as used herein, including in the claims, "or" used in a list of items ending with "at least one of" indicates a disjunctive list, such as, for example, a list of "at least one of A, B, or C" means A or B or C or AB or AC or BC or ABC (i.e., A and B and C).

[0153] Computer-readable media includes both computer storage media and computer communication media, including any medium that facilitates transfer of a computer program from one place to another. Storage media may be any available medium that can be accessed 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 disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer or processor. Also, any connection is properly termed a computer-readable medium. 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, the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. As used herein, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray disc, where disks typically reproduce data magnetically and discs reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media.

[0154] The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications of the disclosure will be readily 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 the disclosure. Furthermore, although elements of the described embodiments may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated. In addition, all or a portion of any embodiment may be used with all or a portion of any other embodiment, unless otherwise stated. Thus, the disclosure is not intended to be limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. [Explanation of symbols]

[0155] 100 Access Network 105 BS, base station 105' Small Cell 110 UE 120 Communication Links 130 Geographical Coverage Area, Coverage Area 130' coverage area 132 Backhaul Link Interface, Backhaul Link 134 Backhaul Link Interface, Backhaul Link 150 Wi-Fi access points (APs) 152 Wi-Fi stations (STA) 154 communication links 158 Device-to-Device (D2D) Communication Links 160 Evolved Packet Core (EPC) 162 Mobility Management Entity (MME) 164 other MMEs 166 Serving Gateway 168 Multimedia Broadcast Multicast Service (MBMS) Gateway 170 Broadcast Multicast Service Center (BM-SC) 172 Packet Data Network (PDN) Gateway 174 Home Subscriber Server (HSS) 176 IP Services 180 mmW base station 190 5G Core (5GC) 192 Access and Mobility Management Function (AMF) 193 Other AMF 194 Session Management Facility (SMF) 195 User Plane Function (UPF) 196 Integrated Data Management (UDM) 197 IP Services 202 Transceiver 206 Receiver 208 Transmitter 212 processors 216 memory 220 modem 222 Communication Components 224 Coherence Components 244 Bus 265 Antenna 275 Applications 288 Radio Frequency (RF) Front End 290 Low Noise Amplifier (LNA) 292 Switch 296 filters 298 Power Amplifier (PA) 302 Transceiver 306 Receiver 308 Transmitter 312 processors 316 memory 320 modem 322 Communication Components 324 Judgment Components 344 Bus 365 Antenna 375 Applications 388 RF Front End 390 Low Noise Amplifier (LNA) 392 Switch 396 filters 398 Power Amplifier (PA) 410 UL TX Chain 412 DAC 414 Mixer 416 Local Oscillator 418 Switch 424 RF Resources 426 RF Resources 450 UL TX Chain 452 DAC 454 Mixer 456 Local Oscillator 458 RF resources

Claims

1. 1. A method of wireless communication by a user equipment (UE) in a network, comprising: generating a capability message indicating a first coherence capability for a first frequency, a second coherence capability for a second frequency, and an uplink (UL) transmit (TX) switching coherence capability; sending the capability message to a base station; receiving UL scheduling information for transmitting first UL data using the first frequency and second UL data using the second frequency; transmitting at least one of the first UL data or the second UL data based on the UL scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

2. receiving, in response to the capability message, from the base station, a configuration message indicating a non-coherent codebook for transmitting at least one of the first UL data or the second UL data; The method of claim 1 , wherein transmitting comprises transmitting at least one of the first UL data or the second UL data using the non-coherent codebook.

3. receiving, in response to the capability message, from the base station, a configuration message indicating a full coherent codebook for transmitting at least one of the first UL data or the second UL data; The method of claim 1 , wherein transmitting comprises transmitting at least one of the first UL data or the second UL data using the fully coherent codebook.

4. receiving, in response to the capability message, from the base station, a configuration message indicating a partially coherent codebook for transmitting at least one of the first UL data or the second UL data; The method of claim 1 , wherein transmitting comprises transmitting at least one of the first UL data or the second UL data using the partially coherent codebook.

5. 10. The method of claim 1, wherein each of the first coherence capability, the second coherence capability, and the UL TX switching coherence capability comprises a fully coherent transmission capability, a partially coherent transmission capability, or a non-coherent transmission capability.

6. The method of claim 5 , wherein the non-coherent transmission capability is a default mode transmission capability.

7. the first frequency comprises a first plurality of frequencies; or The method of claim 1 , wherein the second frequency comprises a second plurality of frequencies.

8. configuring a first UL TX chain to transmit the first UL data using the first frequency; The second UL TX chain transmitting the first UL data using the first frequency; transmitting the second UL data using the second frequency; and switching from a first scheduled transmission of the first UL data to a second scheduled transmission of the second UL data, or from the second scheduled transmission of the second UL data to the first scheduled transmission of the first UL data, wherein the switching maintains coherency in the second UL TX chain; The method of claim 1 , wherein the capability message indicates partial coherent transmission capability or full coherent transmission capability for the UL TX switching coherence capability.

9. configuring a first UL TX chain to transmit the first UL data using the first frequency; The second UL TX chain transmitting the first UL data using the first frequency; transmitting the second UL data using the second frequency; switching from a first scheduled transmission of the first UL data to a second scheduled transmission of the second UL data, or from the second scheduled transmission of the second UL data to the first scheduled transmission of the first UL data, wherein the switching causes a loss of coherency in the second UL TX chain; The method of claim 1 , wherein the capability message indicates non-coherent transmission capability for the UL TX switching coherence capability.

10. generating a UL TX switching capability indicating whether the first UL TX chain or the second UL TX chain is configured for UL TX switching; and transmitting the UL TX switching capability to the base station.

11. a memory having instructions; one or more processors configured to execute the instructions in the memory to generate a capability message indicating a first coherence capability for a first frequency, a second coherence capability for a second frequency, and an uplink (UL) transmit (TX) switching coherence capability; a user equipment (UE) comprising: sending the capability message to a base station; receiving UL scheduling information for transmitting first UL data using the first frequency and second UL data using the second frequency; transmit at least one of the first UL data or the second UL data based on the UL scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

12. 1. A method of wireless communication by a base station, comprising: receiving a capability message from a user equipment (UE) indicating a first coherence capability for a first frequency, a second coherence capability for a second frequency, and an uplink (UL) transmit (TX) switching coherence capability; transmitting, by the UE, UL scheduling information to the UE for transmitting first UL data using the first frequency and second UL data using the second frequency; receiving at least one of the first UL data or the second UL data from the UE based on the UL scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

13. a memory having instructions; one or more processors configured to execute the instructions in the memory; a transceiver, the transceiver comprising: receiving a capability message from a user equipment (UE) indicating a first coherence capability on a first frequency, a second coherence capability on a second frequency, and an uplink (UL) transmit (TX) switching coherence capability; transmitting, by the UE, UL scheduling information to the UE for transmitting first UL data using the first frequency and second UL data using the second frequency; and receiving from the UE at least one of the first UL data or the second UL data based on the UL scheduling information and based on at least one of the first coherence capability, the second coherence capability, or the UL TX switching coherence capability.

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