Uplink transmission switching for two frequency bands

Abstract

In summary, various aspects of the present disclosure relate to wireless communications. In some aspects, a user equipment (UE) may send an indication of one or more switching options supported by the UE, wherein the one or more switching options are associated with performing uplink transmission switching for a first frequency band and a second frequency band. Wherein, at least one of the first frequency band or the second frequency band is a frequency division duplex band, a time division duplex band, or a supplemental uplink frequency band. Uplink multiple input multiple output is allowed on the first frequency band and the second frequency band. The UE may receive information associated with an uplink transmission scheduled for the UE after sending an indication of the one or more switching options, wherein the uplink transmission is scheduled according to the one or more switching options supported by the UE. A plurality of other aspects are provided.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to Patent Cooperation Treaty (PCT) Application No. PCT / CN2020 / 114660, entitled “UPLINK TRANSMIT SWITCHING FOR TWO FREQUENCY BANDS”, filed on September 11, 2020, which has been assigned to the assignee of this application. The disclosure of the prior application is considered to be a part of this patent application and is incorporated into this patent application by reference. Technical Field

[0003]

[0006] Generally speaking, aspects of the disclosure relate to wireless communications, and to techniques and apparatus for uplink transmission switching for two frequency bands. Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may utilize multiple access technologies that are capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of these multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0005] A wireless network may include one or more base stations that support communications for a user equipment (UE) or multiple UEs. A UE may communicate with a base station via downlink communications and uplink communications. A "downlink" (or "DL") refers to the communication link from a base station to a UE, while an "uplink" (or "UL") refers to the communication link from a UE to a base station.

[0006] The above-mentioned multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different UEs to communicate at a city, country, region and / or global level (UE). NR (which may be referred to as 5G) is a set of enhancements to the LTE mobile standard released by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, using new spectrum and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink, using CP-OFDM and / or single carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink, and supporting beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR and other radio access technologies remain useful. Summary of the invention

[0007] In some aspects, a method of wireless communication performed by a user equipment (UE) includes: sending an indication of one or more switching options supported by the UE, wherein the one or more switching options are associated with performing uplink transmission switching for a first frequency band and a second frequency band, wherein at least one of the first frequency band or the second frequency band is a frequency division duplex (FDD) band, a time division duplex (TDD) band, or a supplemental uplink (SUL) band, and wherein uplink multiple input multiple output (MIMO) is allowed on the first frequency band and the second frequency band; and after sending the indication of the one or more switching options, receiving information associated with an uplink transmission scheduled for the UE, wherein the uplink transmission is scheduled according to the one or more switching options supported by the UE.

[0008] In some aspects, a method of wireless communication performed by a base station includes: receiving an indication of one or more switching options supported by a UE, wherein the one or more switching options are associated with performing uplink transmission switching for a first frequency band and a second frequency band, wherein at least one of the first frequency band or the second frequency band is an FDD frequency band, a TDD frequency band, or a SUL frequency band, and wherein uplink MIMO is allowed on the first frequency band and the second frequency band; and after receiving the indication of the one or more switching options, sending information associated with an uplink transmission scheduled for the UE, wherein the uplink transmission is scheduled according to the one or more switching options supported by the UE.

[0009] In some aspects, a UE for wireless communication includes: a memory; and one or more processors coupled to the memory, the one or more processors being configured to: send an indication of one or more switching options supported by the UE, wherein the one or more switching options are associated with performing uplink transmission switching for a first frequency band and a second frequency band, wherein at least one of the first frequency band or the second frequency band is an FDD frequency band, a TDD frequency band, or a SUL frequency band, and wherein uplink MIMO is allowed on the first frequency band and the second frequency band; and after sending the indication of the one or more switching options, receive information associated with an uplink transmission scheduled for the UE, wherein the uplink transmission is scheduled according to the one or more switching options supported by the UE.

[0010] In some aspects, a base station for wireless communication includes: a memory; and one or more processors coupled to the memory, the one or more processors being configured to: receive an indication of one or more switching options supported by a UE, wherein the one or more switching options are associated with performing uplink transmission switching for a first frequency band and a second frequency band, wherein at least one of the first frequency band or the second frequency band is an FDD frequency band, a TDD frequency band, or a SUL frequency band, and wherein uplink MIMO is allowed on the first frequency band and the second frequency band; and after receiving the indication of the one or more switching options, send information associated with an uplink transmission scheduled for the UE, wherein the uplink transmission is scheduled according to the one or more switching options supported by the UE.

[0011] In some aspects, a non-transitory computer-readable medium storing an instruction set for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: send an indication of one or more switching options supported by the UE, wherein the one or more switching options are associated with performing uplink transmission switching for a first frequency band and a second frequency band, wherein at least one of the first frequency band or the second frequency band is an FDD frequency band, a TDD frequency band, or a SUL frequency band, and wherein uplink MIMO is allowed on the first frequency band and the second frequency band; and after sending the indication of the one or more switching options, receive information associated with an uplink transmission scheduled for the UE, wherein the uplink transmission is scheduled according to the one or more switching options supported by the UE.

[0012] In some aspects, a non-transitory computer-readable medium storing an instruction set for wireless communication includes one or more instructions that, when executed by one or more processors of a base station, cause the base station to: receive an indication of one or more switching options supported by a UE, wherein the one or more switching options are associated with performing uplink transmission switching for a first frequency band and a second frequency band, wherein at least one of the first frequency band or the second frequency band is an FDD frequency band, a TDD frequency band, or a SUL frequency band, and wherein uplink MIMO is allowed on the first frequency band and the second frequency band; and after receiving the indication of the one or more switching options, send information associated with an uplink transmission scheduled for the UE, wherein the uplink transmission is scheduled according to the one or more switching options supported by the UE.

[0013] In some aspects, an apparatus for wireless communication includes: a unit for sending an indication of one or more switching options supported by the apparatus, wherein the one or more switching options are associated with performing uplink transmission switching for a first frequency band and a second frequency band, wherein at least one of the first frequency band or the second frequency band is an FDD frequency band, a TDD frequency band, or a SUL frequency band, and wherein uplink MIMO is allowed on the first frequency band and the second frequency band; and a unit for receiving information associated with an uplink transmission scheduled for the apparatus after sending the indication of the one or more switching options, wherein the uplink transmission is scheduled according to the one or more switching options supported by the apparatus.

[0014] In some aspects, an apparatus for wireless communication includes: a unit for receiving an indication of one or more switching options supported by a UE, wherein the one or more switching options are associated with performing uplink transmission switching for a first frequency band and a second frequency band, wherein at least one of the first frequency band or the second frequency band is an FDD frequency band, a TDD frequency band, or a SUL frequency band, and wherein uplink MIMO is allowed on the first frequency band and the second frequency band; and a unit for sending information associated with an uplink transmission scheduled for the UE after receiving the indication of the one or more switching options, wherein the uplink transmission is scheduled according to the one or more switching options supported by the UE.

[0015] Aspects generally include methods, apparatuses, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as generally described herein with reference to the accompanying drawings and as illustrated in the drawings and the description.

[0016] In order to better understand the specific embodiments below, the foregoing broadly summarizes the features and technical advantages of the examples according to the present disclosure. Additional features and advantages will be described below. The disclosed concepts and specific examples can be easily used as a basis for modifying or designing other structures for achieving the same purpose as the present disclosure. These equivalent structures do not depart from the scope of the attached claims. When considered in conjunction with the accompanying drawings, the characteristics of the concepts disclosed herein (their organizational structures and methods of operation) and related advantages will be better understood from the following description. Each of the drawings is provided for the purpose of illustration and description, and not as a definition of the scope of the claims.

[0017] Although various aspects are described in the present disclosure by describing some examples, it will be understood by those skilled in the art that these aspects can be implemented in many different arrangements and scenarios. The technology described herein can be implemented using different platform types, devices, systems, shapes, sizes, and / or packaging arrangements. For example, some aspects can be implemented via integrated chip embodiments or other devices based on non-module components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial devices, retail / purchasing devices, medical devices, and / or artificial intelligence devices). Various aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, and / or system-level components. The device incorporating the described aspects and features may include additional components and features for implementing and practicing the claimed and described aspects. For example, the transmission and reception of wireless signals may include one or more components for analog and digital purposes (e.g., hardware components, including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders, and / or summers). It is intended that the aspects described herein can be practiced in devices, components, systems, distributed arrangements, and / or end-user devices of various sizes, shapes, and configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to be able to understand the above-mentioned features of the present disclosure in detail, the brief summary given above can be described in more detail with reference to some aspects, some of which are shown in the accompanying drawings. However, it should be noted that the accompanying drawings only show certain typical aspects of the present disclosure and therefore should not be considered as limiting the scope of the present disclosure, because the description herein allows other equivalent aspects. The same symbols in different drawings may identify the same or similar elements.

[0019] Figure 1 is a diagram illustrating an example of a wireless network according to the present disclosure.

[0020] Figure 2is a diagram illustrating an example of communication between a base station and a user equipment (UE) in a wireless network according to the present disclosure.

[0021] Figure 3 is a diagram illustrating an example of carrier aggregation according to the present disclosure.

[0022] Figure 4 is a diagram illustrating an example associated with uplink transmission switching for two frequency bands according to the present disclosure.

[0023] Figure 5 and Figure 6 is a diagram illustrating an example process associated with uplink transmission switching for two frequency bands according to the present disclosure. DETAILED DESCRIPTION

[0024] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be implemented in a variety of different forms and should not be interpreted as being limited to any specific structure or function given throughout the present disclosure. Instead, these aspects are provided so that the present disclosure will be thorough and complete, and the scope of the present disclosure will be fully conveyed to those skilled in the art. It should be understood by those skilled in the art that the scope of the present disclosure is intended to cover any aspect of the content disclosed herein, whether it is implemented independently of any other aspect of the present disclosure or combined with any other aspect of the present disclosure. For example, any number of aspects set forth herein can be used to implement a device or implementation method. In addition, the scope of the present disclosure is intended to cover such a device or method implemented using other structures, functions, or structures and functions other than or different from the various aspects of the disclosure given herein. It should be understood that any aspect of the disclosure disclosed herein can be embodied by one or more elements in the claims.

[0025] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or a combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0026] Although aspects may be described using terminology generally associated with 5G or new radio (NR) radio access technology (RAT), aspects of the present disclosure may be applied to other RATs, such as 3G RAT, 4G RAT, and / or post-5G (e.g., 6G) RATs.

[0027] Figure 1 1 is a diagram illustrating an example of a wireless network 100 according to the present disclosure. The wireless network 100 may be or may include elements of a 5G (e.g., NR) network and / or a 4G (e.g., Long Term Evolution (LTE)) network, among others. The wireless network 100 may include one or more base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d), a user equipment (UE) 120 or multiple UEs 120 (shown as UE 120a, UE 120b, UE 120c, UE 120d, and UE 120e), and / or other network entities. The base station 110 is an entity that communicates with the UE 120. The base station 110 (sometimes referred to as a BS) may include, for example, an NR base station, an LTE base station, a Node B, an eNB (e.g., in 4G), a gNB (e.g., in 5G), an access point, and / or a transmit receive point (TRP). Each base station 110 may provide communication coverage for a particular geographic area. In the 3rd Generation Partnership Project (3GPP), the term "cell" can refer to a coverage area of ​​a base station 110 and / or a base station subsystem serving the coverage area, depending on the context in which the term is used.

[0028] The base station 110 may provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. A macro cell may cover a relatively large geographic area (e.g., a radius of several kilometers) and allow unrestricted access by UEs 120 with service subscriptions. A pico cell may cover a relatively small geographic area and allow unrestricted access by UEs 120 with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a home) and allow restricted access by UEs 120 associated with the femto cell (e.g., UEs 120 in a closed subscriber group (CSG)). A base station 110 for a macro cell may be referred to as a macro base station. A base station 110 for a pico cell may be referred to as a pico base station. A base station 110 for a femto cell may be referred to as a femto base station or a home base station. In Figure 1 In the example shown, BS 110a may be a macro base station for macrocell 102a; BS 110b may be a pico base station for picocell 102b; and BS 110c may be a femto base station for femtocell 102c. A base station may support one or more (eg, three) cells.

[0029] In some examples, the cell may not necessarily be stationary, and the geographic area of ​​the cell may move depending on the location of the mobile base station 110 (e.g., a mobile base station). In some examples, the base stations 110 may be interconnected to each other and / or one or more other base stations 110 or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces (e.g., direct physical connections or virtual networks) using any suitable transport network.

[0030] Wireless network 100 may include one or more relay stations. A relay station is an entity that can receive data transmissions from an uplink station (e.g., base station 110 or UE 120) and send data transmissions to a downlink station (e.g., UE 120 or base station 110). A relay station may be a UE 120 that can relay transmissions for other UEs. Figure 1 In the example shown, BS 110d (eg, a relay base station) may communicate with BS 110a (eg, a macro base station) and UE 120d to facilitate communications between BS 110a and UE 120d. Base station 110 that relays communications may be referred to as a relay station, relay base station, repeater, or the like.

[0031] The wireless network 100 may be a heterogeneous network including different types of base stations 110, such as macro base stations, pico base stations, femto base stations, relay base stations, etc. These different types of base stations 110 may have different transmit power levels, different coverage areas, and / or different impacts on interference in the wireless network 100. For example, a macro base station may have a higher transmit power level (e.g., 5 to 40 watts), while a pico base station, a femto base station, and a relay base station may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0032] The network controller 130 may be coupled to or in communication with a set of base stations 110 and provide coordination and control for the base stations. The network controller 130 may communicate with the base stations 110 via backhaul communication links. The base stations 110 may communicate with each other directly or indirectly via wireless or wired backhaul communication links.

[0033] UE 120 can be dispersed throughout the wireless network 100, and each UE 110 can be fixed or mobile. UE 120 can include, for example, access terminals, terminals, mobile stations, and / or subscriber units. UE 120 can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring, a smart bracelet)), an entertainment device (e.g., a music device, a video device, and / or a satellite radio), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing device, a global positioning system device, and / or any other suitable device configured to communicate via a wireless medium.

[0034] Some UEs 120 may be considered as machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. MTC UEs and / or eMTC UEs may include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags that can communicate with a base station, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband IoT) devices. Some UEs 120 may be considered as customer premises equipment. UE 120 may be included inside a housing that houses components (e.g., processor components and / or memory components) of UE 120. In some examples, the processor component and the memory component may be coupled together. For example, a processor component (e.g., one or more processors) and a memory component (e.g., a memory) may be operationally coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0035] In general, any number of wireless networks 100 may be deployed in a given geographic area. Each wireless network 100 may support a specific RAT and may operate on one or more frequencies. RAT may be referred to as a radio technology, air interface, etc. Frequency may be referred to as a carrier, frequency channel, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0036] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using base station 110 as an intermediary to communicate with each other) using one or more side link channels. For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, or vehicle-to-pedestrian (V2P) protocols), and / or mesh networks. In such examples, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein that are performed by base station 110.

[0037] The devices of the wireless network 100 may communicate using an electromagnetic spectrum, which may be subdivided into various categories, bands, channels, etc., based on frequency or wavelength. For example, the devices of the wireless network 100 may communicate using one or more operating bands. In 5GNR, two initial operating bands have been identified as frequency range names FR1 (410 MHz–7.125 GHz) and FR2 (24.25 GHz–52.6 GHz). It should be understood that, although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as the “below 6 GHz” band in various documents and articles. Similar naming issues sometimes arise for FR2, which is often (interchangeably) referred to as the “millimeter wave” band in documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) band identified as a “millimeter wave” band by the International Telecommunication Union (ITU).

[0038] Frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR research has identified the operating band for these mid-band frequencies as the frequency range designation FR3 (7.125 GHz-24.25 GHz). Frequency bands that fall within FR3 may inherit FR1 characteristics and / or FR2 characteristics, and thus may effectively extend the characteristics of FR1 and / or FR2 to mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operations above 52.6 GHz. For example, three higher operating bands have been identified as the frequency range designations FR4a or FR4-1 (52.6 GHz-71 GHz), FR4 (52.6 GHz-114.25 GHz), and FR5 (114.25 GHz-300 GHz). Each of these higher frequency bands falls within the EHF band.

[0039] In view of the above examples, unless otherwise explicitly stated, it should be understood that the terms "below 6 GHz" and the like, if used herein, can broadly represent frequencies that can be less than 6 GHz, can be within FR1, or can include mid-band frequencies. In addition, unless otherwise explicitly stated, it should be understood that the terms "millimeter wave" and the like, if used herein, can broadly represent frequencies that can include mid-band frequencies, can be within FR2, FR4, FR4-a or FR4-1, and / or FR5, or can be within the EHF band. It is contemplated that the frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) can be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0040] As mentioned above, providing Figure 1 As an example. Other examples may be different from the Figure 1 Examples described.

[0041] Figure 2 2 is a diagram illustrating an example 200 of base station 110 communicating with UE 120 in wireless network 100 according to the present disclosure. Base station 110 may be equipped with a set of antennas 234a to 234t, e.g., T antennas (T≥1). UE 120 may be equipped with a set of antennas 252a to 252r, e.g., R antennas (R≥1).

[0042] At the base station 110, the transmit processor 220 may receive data intended for the UE 120 (or a group of UEs 120) from the data source 212. The transmit processor 220 may select one or more modulation and coding schemes (MCS) for the UE 120 based at least in part on one or more channel quality indicators (CQIs) received from the UE 120. The UE 120 may process (e.g., encode and modulate) the data for the UE 120 based at least in part on the MCS selected for the UE 120, and may provide data symbols for the UE 120. The transmit processor 220 may process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper layer signaling), and provide overhead symbols and control symbols. The transmit processor 220 may generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signals (PSS) or secondary synchronization signals (SSS)). If applicable, the transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, and can provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modems), as shown by modems 232a to 232t. For example, each output symbol stream can be provided to a modulator component (shown as MOD) of the modem 232. Each modem 232 can use a corresponding modulator component to process a corresponding output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modem 232 can also use a corresponding modulator component to process (e.g., convert to analog, amplify, filter and / or upconvert) the output sample stream to obtain a downlink signal. The modems 232a to 232t can transmit a set of downlink signals (e.g., T downlink signals) via a corresponding antenna group 234 (e.g., T antennas), shown as antennas 234a to 234t.

[0043] At the UE 120, an antenna group 252 (shown as antennas 252a to 252r) can receive downlink signals from the base station 110 and / or other base stations 110, and can provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems), shown as modems 254a to 254r. For example, each received signal can be provided to a demodulator component (shown as DEMOD) of the modem 254. Each modem 254 can use a corresponding demodulator component to condition (e.g., filter, amplify, downconvert and / or digitize) the received signal to obtain input samples. Each modem 254 can use the demodulator component to further process the input samples (e.g., for OFDM) to obtain received symbols. The MIMO detector 256 can obtain received symbols from the modem 254, perform MIMO detection on the received symbols if applicable, and provide detected symbols. The receive processor 258 may process (e.g., demodulate and decode) detected symbols, may provide decoded data for the UE 120 to the data sink 260, and may provide decoded control information and system information to the controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and / or a CQI parameter, among other things. In some examples, one or more components of the UE 120 may be included in the housing 284.

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

[0045] One or more antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include or may be included in one or more antenna panels, one or more antenna groups, one or more groups of antenna elements, and / or one or more antenna arrays, etc. An antenna panel, an antenna group, a group of antenna elements, and / or an antenna array may include one or more antenna elements (within a single housing or multiple housings), a group of coplanar antenna elements, a group of non-coplanar antenna elements, and / or one or more antenna elements coupled to one or more transmit and / or receive components, e.g. Figure 2 One or more components of a

[0046] On the uplink, at the UE 120, the transmit processor 264 may receive and process data from the data source 262 and control information from the controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI). The transmit processor 264 may generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by the TX MIMO processor 266 if applicable, further processed by the modem 254 (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to the base station 110. In some examples, the modem 254 of the UE 120 may include a modulator and a demodulator. In some examples, the UE 120 includes a transceiver. The transceiver may include any combination of an antenna 252, a modem 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, and / or a TX MIMO processor 266. The transceiver may be used by a processor (eg, controller / processor 280) and memory 282 to perform aspects of any of the methods described herein (eg, with reference to Figure 4-Figure 6 ).

[0047] At the base station 110, uplink signals from the UE 120 and / or other UEs may be received by the antenna 234, processed by the modem 232 (e.g., a demodulator component of the modem 232, shown as DEMOD), detected by the MIMO detector 236 if applicable, and further processed by the receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and the decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244. The base station 110 may include a scheduler 246 for scheduling one or more UEs 120 for downlink and / or uplink communications. In some examples, the modem 232 of the base station 110 may include a modulator and a demodulator. In some examples, the base station 110 includes a transceiver. The transceiver may include any combination of antenna 234, modem 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform aspects of any of the methods described herein (e.g., reference 200). Figure 4-Figure 6 ).

[0048] As described in more detail elsewhere herein, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2Any other components of the base station 110 may perform one or more techniques associated with switching uplink transmissions for two frequency bands. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component of the can perform or direct e.g. Figure 5 The process of 500 Figure 6 600 and / or other processes as described herein. Memory 242 and memory 282 may store data and program codes for base station 110 and UE 120, respectively. In some examples, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, one or more instructions, when executed (e.g., directly or after compilation, conversion, and / or interpretation) by one or more processors of base station 110 and / or UE 120, may cause one or more processors, UE 120, and / or base station 110 to perform or direct, for example, Figure 5 The process of 500 Figure 6 The operations of process 600 and / or other processes described herein. In some examples, executing instructions may include running instructions, converting instructions, compiling instructions, and / or interpreting instructions, etc.

[0049] In some aspects, UE 120 may include: a unit for sending an indication of one or more switching options supported by the UE, wherein the one or more switching options are associated with performing an uplink transmission switching for a first frequency band and a second frequency band, wherein at least one of the first frequency band or the second frequency band is an FDD frequency band, a TDD frequency band, or a SUL frequency band, and wherein uplink MIMO is allowed on the first frequency band and the second frequency band; a unit for receiving information associated with an uplink transmission scheduled for the UE after sending the indication of the one or more switching options, wherein the uplink transmission is scheduled according to the one or more switching options supported by the UE; and so on. In some aspects, such a unit may include combining Figure 2 One or more components of UE 120 are depicted, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and the like.

[0050] In some aspects, base station 110 may include: a unit for sending an indication of one or more switching options supported by UE 120, wherein the one or more switching options are associated with performing an uplink transmission switching for a first frequency band and a second frequency band, wherein at least one of the first frequency band or the second frequency band is an FDD frequency band, a TDD frequency band, or a SUL frequency band, and wherein uplink MIMO is allowed on the first frequency band and the second frequency band; a unit for sending information associated with an uplink transmission scheduled for the UE after receiving the indication of the one or more switching options, wherein the uplink transmission is scheduled according to the one or more switching options supported by the UE; and so on. In some aspects, such a unit may include in conjunction with Figure 2 One or more components of base station 110 are depicted, such as antenna 234, demodulator 232, MIMO detector 236, receive processor 238, controller / processor 240, transmit processor 220, TX MIMO processing 230, modulator 232, antenna 234, and the like.

[0051] Although Figure 2 The blocks in the 200 are shown as distinct components, but the functions described above for these blocks may be implemented in a single hardware, software, or combined component or various combinations of components. For example, the functions described for the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 may be performed by or under the control of the controller / processor 280.

[0052] As mentioned above, providing Figure 2 As an example. Other examples may be different from the Figure 2 Examples described.

[0053] Figure 3 is a diagram illustrating an example 300 of carrier aggregation according to the present disclosure.

[0054] Carrier aggregation is a technique that enables two or more component carriers (CCs, sometimes referred to as carriers) to be combined (e.g., combined into a single channel) for a single UE 120 to enhance data capacity. As shown, the carriers can be combined in the same or different frequency bands. Additionally or alternatively, contiguous or non-contiguous carriers can be combined. The base station 110 can configure carrier aggregation for the UE 120, for example, in a radio resource control (RRC) message, a downlink control information (DCI) message, etc.

[0055] As indicated at reference numeral 305, in some aspects, carrier aggregation may be configured in an intra-band contiguous mode, where the aggregated carriers are contiguous with each other and in the same frequency band. As indicated at reference numeral 310, in some aspects, carrier aggregation may be configured in an intra-band discontiguous mode, where the aggregated carriers are discontiguous with each other and in the same frequency band. As indicated at reference numeral 315, in some aspects, carrier aggregation may be configured in an inter-band discontiguous mode, where the aggregated carriers are discontiguous with each other and in different frequency bands.

[0056] In carrier aggregation, a UE 120 may be configured with a primary carrier and one or more secondary carriers. In some aspects, the primary carrier may carry control information (e.g., downlink control information, scheduling information, etc.) for scheduling data communications on one or more secondary carriers, which may be referred to as cross-carrier scheduling. In some aspects, a carrier (e.g., a primary carrier or a secondary carrier) may carry control information for scheduling data communications on the carrier, which may be referred to as self-carrier scheduling or carrier self-scheduling.

[0057] As mentioned above, providing Figure 3 As an example. Other examples may be different from the Figure 3 Examples described.

[0058] In some wireless communication systems, the UE may be able to use two frequency bands to support uplink inter-band carrier aggregation (CA). Typically, in association with supporting uplink inter-band CA, the first transmission chain of the UE is used to communicate on a time division duplex (TDD) band, and the second transmission chain of the UE is used to communicate on a frequency division duplex (FDD) band. In some wireless communication systems, it is desirable to support uplink MIMO for the TDD band. In this case, since the UE includes only two transmission chains, the UE needs to perform uplink transmission switching so that one of the two transmission chains switches back and forth between the TDD band and the FDD band. However, in some cases, the UE may be configured to communicate using two TDD bands. In order to make better use of the available TDD bands, it is desirable to extend the uplink transmission switching to cover uplink transmission switching for two TDD bands (rather than the TDD band and the FDD band).

[0059] In addition, a supplementary uplink (SUL) is supported in some wireless communication systems. It is noteworthy that SUL may have different (e.g., imposed standard) restrictions than CA. Therefore, the options for performing uplink transmission switching for SUL may be different from the options for performing uplink transmission switching for CA. For example, uplink MIMO may not be allowed for the frequency band of SUL, which means that ports can only be scheduled for SUL. As another example, when one of the frequency bands is the SUL frequency band, concurrent transmission on the two frequency bands may not be supported. Therefore, the problem to be solved in association with providing uplink transmission switching for two TDD frequency bands is that CA and SUL have different switching options (due to the limitations of SUL). Therefore, in the uplink transmission switching scenario, it is necessary to understand the switching options that the UE can perform in association with scheduling uplink transmission.

[0060] In addition, asynchronous CA is supported in some wireless communication systems. In traditional (synchronous) CA, complete alignment in the time domain between different frequency bands is provided (for example, the system frame number (SFN) is aligned between different frequency bands), which means that all transmissions on different frequency bands are completely synchronized. In contrast, asynchronous CA provides time slot level synchronization, which means that there may be an uplink interleaving pattern between the two frequency bands at the time slot level. It is worth noting that asynchronous CA and uplink transmission switching for two TDD frequency bands can be used together to increase the uplink transmission capability of the UE. However, one problem associated with providing uplink transmission switching in an asynchronous CA scenario that needs to be solved is that the UE needs to determine whether sufficient switching time and preparation time associated with performing uplink transmission switching is provided.

[0061] Some aspects described herein provide techniques and apparatus for uplink transmission switching for two frequency bands. In some aspects, a UE may send and a base station may receive an indication of one or more switching options supported by the UE. Here, one or more switching options are associated with performing uplink transmission switching for a first frequency band and a second frequency band. In some aspects, at least one of the first frequency band or the second frequency band is an FDD frequency band, a TDD frequency band, or a SUL frequency band. In some aspects, a base station may send and a UE may receive information associated with an uplink transmission scheduled for the UE, wherein the uplink transmission is scheduled according to one or more switching options supported by the UE. More details are provided below.

[0062] Figure 4 4 is a diagram illustrating an example 400 associated with uplink transmission switching for two frequency bands according to the present disclosure. Figure 4As shown, example 400 includes communications between base station 110 and UE 120. In some aspects, base station 110 and UE 120 may be included in a wireless network, such as wireless network 100. Base station 110 and UE 120 may communicate over a wireless access link, which may include an uplink and a downlink.

[0063] like Figure 4 As shown in FIG. 4A and FIG. 4B , UE 120 may send, and base station 110 may receive, an indication of one or more switching options supported by UE 120. In some aspects, the one or more switching options are associated with performing an uplink transmission switch for the first frequency band and the second frequency band. Thus, in some aspects, UE 120 sends, and base station 110 receives, an indication of one or more switching options supported by UE 120 for performing an uplink transmission switch for the first and second frequency bands.

[0064] In some aspects, at least one of the first frequency band or the second frequency band is an FDD frequency band, a TDD frequency band, or a SUL frequency band. For example, in some aspects, the first frequency band is a first FDD frequency band and the second frequency band is a second FDD frequency band. As another example, in some aspects, the first frequency band is a TDD frequency band and the second frequency band is a SUL frequency band. As another example, in some aspects, the first frequency band is a first TDD frequency band and the second frequency band is a second TDD frequency band. Therefore, one or more switching options may be associated with performing uplink transmission switching for two TDD frequency bands in some aspects.

[0065] As indicated by reference numeral 410, base station 110 may schedule uplink transmissions based on one or more switching options supported by UE 120. For example, base station 110 may receive an indication of one or more switching options supported by UE 120 associated with performing uplink transmission switching for a first frequency band and a second frequency band. Here, base station 110 schedules uplink transmissions for UE 120 based at least in part on the one or more switching options supported by UE 120. That is, base station 110 may schedule uplink transmissions such that any uplink transmission switching associated with transmitting uplink transmissions that needs to be performed by UE 120 is supported by UE 120 (i.e., can be performed by UE 120).

[0066] As indicated by reference numeral 415, the base station 110 may send, and the UE 120 may receive, information associated with uplink transmissions scheduled for the UE 120. That is, after sending an indication of one or more handover options supported by the UE 120, the UE 120 may receive scheduling information associated with uplink transmissions scheduled by the base station 110 according to the one or more handover options supported by the UE 120.

[0067] As shown in reference numeral 420, after receiving the scheduling information, UE 120 may perform an uplink transmission switch associated with sending an uplink transmission. For example, UE 120 may receive the scheduling information, may determine that UE 120 will perform an uplink transmission switch associated with sending an uplink transmission, and may perform the uplink transmission switch accordingly. In some aspects, UE 120 sends the uplink transmission after performing the uplink transmission switch. In some aspects, the uplink transmission may be sent without performing the uplink transmission switch (e.g., when the uplink transmission is scheduled so that UE 120 does not need to perform the uplink transmission switch in order to send the uplink transmission).

[0068] In some aspects, the second frequency band is a SUL frequency band, and uplink MIMO is not allowed on the SUL frequency band.

[0069] In one example aspect, the one or more switching options include a switching option associated with switching between a first configuration, a second configuration, and a third configuration. In the first configuration, the first antenna port is associated with a first frequency band and the second antenna port is associated with a second frequency band. Here, the first configuration may support scheduling of uplink transmissions on only the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port. In the second configuration, the first antenna port and the second antenna port are associated with a second frequency band. Here, the second configuration may support scheduling of uplink transmissions on only the second antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port. In the third configuration, the first antenna port and the second antenna port are associated with a first frequency band. Here, the third configuration may support scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port.

[0070] In another example aspect, the one or more switching options include a switching option associated with switching between a first configuration, a second configuration, and a third configuration. In the first configuration, the first antenna port is associated with a first frequency band and the second antenna port is associated with a second frequency band. Here, the first configuration may support scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port. In the second configuration, the first antenna port and the second antenna port are associated with a second frequency band. Here, the second configuration may support scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the second antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port. In the third configuration, the first antenna port and the second antenna port are associated with the first frequency band. Here, the third configuration may support scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions being scheduled on the first antenna port or the second antenna port.

[0071] In some aspects, the second frequency band is a SUL frequency band, and uplink MIMO is enabled on the SUL frequency band.

[0072] In one example aspect, the one or more switching options include a switching option associated with switching between a first configuration, a second configuration, and a third configuration. In the first configuration, the first antenna port is associated with a first frequency band and the second antenna port is associated with a second frequency band. Here, the first configuration may support scheduling of uplink transmissions on only the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port. In the second configuration, the first antenna port and the second antenna port are associated with a second frequency band. Here, the second configuration may support scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the second antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port. In the third configuration, the first antenna port and the second antenna port are associated with a first frequency band. Here, the third configuration may support scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port.

[0073] In another example aspect, the one or more switching options include a switching option associated with switching between a first configuration, a second configuration, and a third configuration. In the first configuration, the first antenna port is associated with a first frequency band and the second antenna port is associated with a second frequency band. Here, the first configuration may support scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port. In the second configuration, the first antenna port and the second antenna port are associated with a second frequency band. Here, the second configuration may support scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the second antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port. In the third configuration, the first antenna port and the second antenna port are associated with the first frequency band. Here, the third configuration may support scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions being scheduled on the first antenna port or the second antenna port.

[0074] In some aspects, UE 120 may determine whether uplink transmission is scheduled to provide UE 120 with sufficient time to perform uplink transmission switching based on a carrier aggregation slot offset value (e.g., CA_slot_offset). For example, UE 120 may determine whether uplink transmission is scheduled to provide UE 120 with sufficient time to perform uplink transmission switching based on a carrier aggregation slot offset value (e.g., CA_slot_offset). offset -CA_slot_offset is determined based on information received before (e.g., one or more DCIs) or based on higher layer configuration before switching: insufficient time provided for the UE to transmit in the uplink, where T0 is the start time of the first symbol of the transmission opportunity of the uplink channel or signal, T offset It is the preparation process time for the opportunity of uplink channel or signal transmission, and CA_Slot_offset is derived from the high-level configuration ca-SlotOffset. In some aspects, CA_Slot_offset is an absolute time value, an example of which is as follows:

[0075]

[0076] Where Tslot,PDSCH is the slot time of the physical downlink shared channel (eg, in milliseconds).

[0077] In some aspects, the UE 120 is configured such that an expected uplink transmission is scheduled according to a carrier aggregation slot offset value to provide the UE 120 with sufficient time to perform an uplink transmission switch.

[0078] In some aspects, UE 120 may identify a handover scheduling error condition based at least in part on determining that uplink transmissions were not scheduled to provide sufficient time for the UE to perform an uplink transmission switch.

[0079] In some aspects, UE 120 may skip performance of an uplink transmission switch associated with transmitting an uplink transmission based at least in part on determining that the uplink transmission is not scheduled to provide sufficient time for the UE to perform the uplink transmission switch.

[0080] Note that in some aspects, UE 120 is configured for intra-band CA. In such a case, UE 120 can be configured to check component carriers in a frequency band for intra-band CA associated with determining whether to perform uplink transmission switching.

[0081] As mentioned above, providing Figure 4 As an example. Other examples may be different from the Figure 4 Examples described.

[0082] Figure 5 is a diagram illustrating an example process 500, performed, for example, by a UE, according to the present disclosure. Example process 500 is an example of operations in which a UE (eg, UE 120) performs uplink transmission switching for two frequency bands.

[0083] like Figure 5 As shown, in some aspects, process 500 may include: sending an indication of one or more switching options supported by the UE, wherein the one or more switching options are associated with performing uplink transmission switching for the first frequency band and the second frequency band (block 510). For example, the UE (e.g., using antenna 252, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280 and / or memory 282) may send an indication of one or more switching options supported by the UE, wherein the one or more switching options are associated with performing uplink transmission switching for the first frequency band and the second frequency band, as described above. In some aspects, at least one of the first frequency band or the second frequency band is an FDD frequency band, a TDD frequency band, or a SUL frequency band. In some aspects, uplink MIMO is allowed on the first frequency band and the second frequency band.

[0084] like Figure 5As further shown, in some aspects, process 500 may include, after sending the indication of the one or more switching options, receiving information associated with uplink transmissions scheduled for the UE, wherein the uplink transmissions are scheduled in accordance with the one or more switching options supported by the UE (block 520). For example, the UE (e.g., using antenna 252, demodulator 254, MIMO detector 256, receive processor 258, controller / processor 280, and / or memory 282) may receive information associated with uplink transmissions scheduled for the UE after sending the indication of the one or more switching options, wherein the uplink transmissions are scheduled in accordance with the one or more switching options supported by the UE, as described above.

[0085] Process 500 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0086] In a first aspect, process 500 includes performing an uplink transmission switch associated with transmitting the uplink transmission scheduled for the UE, the uplink transmission switch being performed in accordance with one or more switching options supported by the UE.

[0087] In a second aspect, alone or in combination with the first aspect, the first frequency band is a first TDD frequency band and the second frequency band is a second TDD frequency band.

[0088] In a third aspect, alone or in combination with one or more of the first and second aspects, at least one of the first frequency band or the second frequency band is a FDD frequency band.

[0089] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the second frequency band is a SUL frequency band, and uplink MIMO is not allowed on the SUL frequency band.

[0090] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the one or more switching options include switching options associated with switching between a first configuration, a second configuration, and a third configuration: the first configuration supports scheduling of uplink transmissions only on the second antenna port, scheduling of uplink transmissions only on the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the first configuration, the first antenna port is associated with the first frequency band and the second antenna port is associated with the second frequency band, the second configuration supports scheduling of uplink transmissions only on the second antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the second configuration, the first antenna port and the second antenna port are associated with the second frequency band, and the third configuration supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions only on the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the third configuration, the first antenna port and the second antenna port are associated with the first frequency band.

[0091] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the one or more switching options include switching options associated with switching between a first configuration, a second configuration, and a third configuration: the first configuration supports scheduling of concurrent uplink transmissions on a first antenna port and a second antenna port, scheduling of uplink transmissions only on the second antenna port, scheduling of uplink transmissions only on the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the first configuration, the first antenna port is associated with the first frequency band and the second antenna port is associated with the second frequency band, and the second configuration supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port. and scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions only on the second antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the second configuration, the first antenna port and the second antenna port are associated with the second frequency band, and a third configuration supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions only on the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the third configuration, the first antenna port and the second antenna port are associated with the first frequency band.

[0092] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the second frequency band is a SUL frequency band, and uplink MIMO is enabled on the SUL frequency band.

[0093] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the one or more switching options include switching options associated with switching between a first configuration, a second configuration, and a third configuration: the first configuration supports scheduling of uplink transmissions on only the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein, in the first configuration, the first antenna port is associated with the first frequency band and the second antenna port is associated with the second frequency band, and the second configuration supports concurrent uplink transmissions on the first antenna port and the second antenna port. The invention relates to a method for supporting scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the second antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the second configuration, the first antenna port and the second antenna port are associated with the second frequency band, and a third configuration supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the third configuration, the first antenna port and the second antenna port are associated with the first frequency band.

[0094] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, the one or more switching options include switching options associated with switching between a first configuration, a second configuration, and a third configuration: the first configuration supports scheduling of concurrent uplink transmissions on a first antenna port and a second antenna port, scheduling of uplink transmissions only on the second antenna port, scheduling of uplink transmissions only on the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the first configuration, the first antenna port is associated with the first frequency band and the second antenna port is associated with the second frequency band, and the second configuration supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port. and scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions only on the second antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the second configuration, the first antenna port and the second antenna port are associated with the second frequency band, and a third configuration supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions only on the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the third configuration, the first antenna port and the second antenna port are associated with the first frequency band.

[0095] In the tenth aspect, alone or in combination with one or more of the first to ninth aspects, the UE is configured to: expect the uplink transmission to be scheduled according to the carrier aggregation time slot offset value to provide the UE with sufficient time to perform uplink transmission switching associated with sending the uplink transmission.

[0096] In an eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, process 500 includes identifying a switching scheduling error condition based at least in part on determining that the uplink transmission was not scheduled to provide sufficient time for the UE to perform the uplink transmission switch.

[0097] In a twelfth aspect, either alone or in combination with one or more of aspects one to eleven, process 500 includes skipping execution of the uplink transmission switch associated with sending the uplink transmission based at least in part on determining that the uplink transmission is not scheduled to provide sufficient time for the UE to perform the uplink transmission switch.

[0098] In a thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, the UE is configured for intra-band CA and is configured to check a component carrier in a frequency band for intra-band CA associated with determining whether to perform uplink transmission switching.

[0099] Although Figure 5 Example blocks of process 500 are shown, but in some aspects, process 500 may include Figure 5 Additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those shown. Additionally or alternatively, two or more of the blocks of process 500 may be performed in parallel.

[0100] Figure 6 is a diagram illustrating an example process 600, performed, for example, by a base station, according to the present disclosure. Example process 600 is an example of operations in which a base station (eg, base station 110) performs uplink transmission switching for two frequency bands.

[0101] like Figure 6 As shown, in some aspects, process 600 may include: receiving an indication of one or more switching options supported by the UE, wherein the one or more switching options are associated with performing an uplink transmission switch for a first frequency band and a second frequency band (block 610). For example, a base station (e.g., using antenna 234, demodulator 232, MIMO detector 236, receive processor 238, controller / processor 240, and / or memory 242) may receive an indication of one or more switching options supported by the UE (e.g., UE 120), wherein the one or more switching options are associated with performing an uplink transmission switch for a first frequency band and a second frequency band, as described above. In some aspects, at least one of the first frequency band or the second frequency band is an FDD frequency band, a TDD frequency band, or a SUL frequency band. In some aspects, uplink MIMO is allowed on the first frequency band and the second frequency band.

[0102] like Figure 6 As further shown, in some aspects, process 600 may include, after receiving an indication of one or more switching options, sending information associated with uplink transmissions scheduled for the UE, wherein the uplink transmissions are scheduled in accordance with one or more switching options supported by the UE (block 620). For example, a base station (e.g., using transmit processor 220, TX MIMO processor 230, modulator 232, antenna 234, controller / processor 240, memory 242, and / or scheduler 246) may send information associated with uplink transmissions scheduled for the UE after receiving an indication of one or more switching options, wherein the uplink transmissions are scheduled in accordance with one or more switching options supported by the UE, as described above.

[0103] Process 600 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0104] In a first aspect, the first frequency band is a first TDD frequency band and the second frequency band is a second TDD frequency band.

[0105] In a second aspect, alone or in combination with the first aspect, at least one of the first frequency band or the second frequency band is a FDD frequency band.

[0106] In a third aspect, alone or in combination with one or more of the first and second aspects, the second frequency band is a SUL frequency band, and uplink MIMO is not allowed on the SUL frequency band.

[0107] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the one or more switching options include switching options associated with switching between a first configuration, a second configuration, and a third configuration: the first configuration supports scheduling of uplink transmissions only on the second antenna port, scheduling of uplink transmissions only on the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the first configuration, the first antenna port is associated with the first frequency band and the second antenna port is associated with the second frequency band, the second configuration supports scheduling of uplink transmissions only on the second antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the second configuration, the first antenna port and the second antenna port are associated with the second frequency band, and the third configuration supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions only on the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the third configuration, the first antenna port and the second antenna port are associated with the first frequency band.

[0108] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the one or more switching options include switching options associated with switching between a first configuration, a second configuration, and a third configuration: the first configuration supports scheduling of concurrent uplink transmissions on a first antenna port and a second antenna port, scheduling of uplink transmissions only on the second antenna port, scheduling of uplink transmissions only on the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the first configuration, the first antenna port is associated with the first frequency band and the second antenna port is associated with the second frequency band, and the second configuration supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port. and scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions only on the second antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the second configuration, the first antenna port and the second antenna port are associated with the second frequency band, and a third configuration supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions only on the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the third configuration, the first antenna port and the second antenna port are associated with the first frequency band.

[0109] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the second frequency band is a SUL frequency band, and uplink MIMO is enabled on the SUL frequency band.

[0110] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the one or more switching options include switching options associated with switching between a first configuration, a second configuration, and a third configuration: the first configuration supports scheduling of uplink transmissions only on the second antenna port, scheduling of uplink transmissions only on the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein, in the first configuration, the first antenna port is associated with the first frequency band and the second antenna port is associated with the second frequency band, and the second configuration supports concurrent uplink transmissions on the first antenna port and the second antenna port. The invention relates to a method for supporting scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the second antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the second configuration, the first antenna port and the second antenna port are associated with the second frequency band, and a third configuration supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the third configuration, the first antenna port and the second antenna port are associated with the first frequency band.

[0111] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the one or more switching options include switching options associated with switching between a first configuration, a second configuration, and a third configuration: the first configuration supports scheduling of concurrent uplink transmissions on a first antenna port and a second antenna port, scheduling of uplink transmissions only on the second antenna port, scheduling of uplink transmissions only on the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the first configuration, the first antenna port is associated with the first frequency band and the second antenna port is associated with the second frequency band, and the second configuration supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port. and scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions only on the second antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the second configuration, the first antenna port and the second antenna port are associated with the second frequency band, and a third configuration supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions only on the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the third configuration, the first antenna port and the second antenna port are associated with the first frequency band.

[0112] Although Figure 6 Example blocks of process 600 are shown, but in some aspects process 600 may include Figure 6 Additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those shown. Additionally or alternatively, two or more of the blocks of process 600 may be performed in parallel.

[0113] The following provides an overview of some aspects of the disclosure:

[0114] Aspect 1: A method for wireless communication performed by a user equipment (UE), comprising: sending an indication of one or more switching options supported by the UE, wherein the one or more switching options are associated with performing uplink transmission switching for a first frequency band and a second frequency band, wherein at least one of the first frequency band or the second frequency band is a frequency division duplex (FDD) band, a time division duplex (TDD) band, or a supplemental uplink (SUL) band; and after sending the indication of the one or more switching options, receiving information associated with an uplink transmission scheduled for the UE, wherein the uplink transmission is scheduled according to the one or more switching options supported by the UE.

[0115] Aspect 2: The method according to aspect 1 further includes: performing uplink transmission switching associated with sending the uplink transmission scheduled for the UE, and the uplink transmission switching is performed according to one or more switching options supported by the UE.

[0116] Aspect 3: The method according to any of aspects 1-2, wherein the first frequency band is a first TDD frequency band and the second frequency band is a second TDD frequency band.

[0117] Aspect 4: The method according to any of aspects 1-2, wherein at least one of the first frequency band or the second frequency band is an FDD frequency band.

[0118] Aspect 5: The method according to any of aspects 1-2, wherein the second frequency band is a SUL frequency band, and uplink multiple-input multiple-output (MIMO) is not allowed on the SUL frequency band.

[0119] Aspect 6: A method according to aspect 5, wherein the one or more switching options include a switching option associated with switching between: a first configuration that supports scheduling of uplink transmissions on only the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the first configuration, the first antenna port is associated with the first frequency band and the second antenna port is associated with the second frequency band, a second configuration that supports scheduling of uplink transmissions on only the second antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the second configuration, the first antenna port and the second antenna port are associated with the second frequency band, and a third configuration that supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the third configuration, the first antenna port and the second antenna port are associated with the first frequency band.

[0120] Aspect 7: The method according to aspect 5, wherein the one or more switching options include a switching option associated with switching between: a first configuration that supports scheduling of concurrent uplink transmissions on a first antenna port and a second antenna port, scheduling of uplink transmissions on only the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmission is scheduled on the first antenna port or the second antenna port, wherein in the first configuration, the first antenna port is associated with the first frequency band and the second antenna port is associated with the second frequency band, and a second configuration that supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions only on the second antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein, in the second configuration, the first antenna port and the second antenna port are associated with the second frequency band, and a third configuration supporting scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions only on the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein, in the third configuration, the first antenna port and the second antenna port are associated with the first frequency band.

[0121] Aspect 8: The method according to any of aspects 1-2, wherein the second frequency band is a SUL frequency band, and uplink multiple-input multiple-output (MIMO) is allowed on the SUL frequency band.

[0122] Aspect 9: A method according to aspect 8, wherein the one or more switching options include a switching option associated with switching between: a first configuration that supports scheduling of uplink transmissions on only the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the first configuration, the first antenna port is associated with the first frequency band and the second antenna port is associated with the second frequency band, a second configuration that supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the second antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the second configuration, the first antenna port and the second antenna port are associated with the second frequency band, and a third configuration that supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the third configuration, the first antenna port and the second antenna port are associated with the first frequency band.

[0123] Aspect 10: A method according to aspect 8, wherein the one or more switching options include a switching option associated with switching between: a first configuration that supports scheduling of concurrent uplink transmissions on a first antenna port and a second antenna port, scheduling of uplink transmissions on only the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the first configuration, the first antenna port is associated with the first frequency band and the second antenna port is associated with the second frequency band, and a second configuration that supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions only on the second antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein, in the second configuration, the first antenna port and the second antenna port are associated with the second frequency band, and a third configuration supporting scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions only on the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein, in the third configuration, the first antenna port and the second antenna port are associated with the first frequency band.

[0124] Aspect 11: A method according to any aspect of Aspects 1-10, wherein the UE is configured to: expect the uplink transmission to be scheduled to provide the UE with sufficient time to perform uplink transmission switching associated with sending the uplink transmission based on a carrier aggregation time slot offset value.

[0125] Aspect 12: The method according to any aspect of Aspects 1-11 also includes: identifying a switching scheduling error situation based at least in part on determining that the uplink transmission is not scheduled, so as to provide sufficient time for the UE to perform the uplink transmission switching.

[0126] Aspect 13: The method according to any aspect of Aspects 1-12 also includes: skipping the execution of the uplink transmission switch associated with sending the uplink transmission based at least in part on determining that the uplink transmission is not scheduled, so as to provide sufficient time for the UE to perform the uplink transmission switch.

[0127] Aspect 14: The method according to any of aspects 1-13, wherein the UE is configured for intra-band carrier aggregation (CA) and is configured to check a component carrier in a frequency band for intra-band CA associated with determining whether to perform uplink transmission switching.

[0128] Aspect 15: A method of wireless communication performed by a base station, comprising: receiving an indication of one or more switching options supported by a user equipment (UE), wherein the one or more switching options are associated with performing uplink transmission switching for a first frequency band and a second frequency band, wherein at least one of the first frequency band or the second frequency band is a frequency division duplex (FDD) band, a time division duplex (TDD) band, or a supplemental uplink (SUL) band; and after receiving the indication of the one or more switching options, sending information associated with an uplink transmission scheduled for the UE, wherein the uplink transmission is scheduled according to the one or more switching options supported by the UE.

[0129] Aspect 16: The method according to aspect 15, wherein the first frequency band is a first TDD frequency band and the second frequency band is a second TDD frequency band.

[0130] Aspect 17: The method according to any of aspects 15-16, wherein at least one of the first frequency band or the second frequency band is an FDD frequency band.

[0131] Aspect 18: The method according to any of aspects 15-16, wherein the second frequency band is a SUL frequency band, and uplink multiple-input multiple-output (MIMO) is not allowed on the SUL frequency band.

[0132] Aspect 19: A method according to aspect 18, wherein the one or more switching options include a switching option associated with switching between: a first configuration that supports scheduling of uplink transmissions on only the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the first configuration, the first antenna port is associated with the first frequency band and the second antenna port is associated with the second frequency band, a second configuration that supports scheduling of uplink transmissions on only the second antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the second configuration, the first antenna port and the second antenna port are associated with the second frequency band, and a third configuration that supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the third configuration, the first antenna port and the second antenna port are associated with the first frequency band.

[0133] Aspect 20: A method according to aspect 18, wherein the one or more switching options include a switching option associated with switching between: a first configuration that supports scheduling of concurrent uplink transmissions on a first antenna port and a second antenna port, scheduling of uplink transmissions on only the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the first configuration, the first antenna port is associated with the first frequency band and the second antenna port is associated with the second frequency band, and a second configuration that supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions only on the second antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein, in the second configuration, the first antenna port and the second antenna port are associated with the second frequency band, and a third configuration that supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions only on the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein, in the third configuration, the first antenna port and the second antenna port are associated with the first frequency band.

[0134] Aspect 21: The method according to any of aspects 15-16, wherein the second frequency band is a SUL frequency band, and uplink multiple-input multiple-output (MIMO) is enabled on the SUL frequency band.

[0135] Aspect 22: A method according to aspect 21, wherein the one or more switching options include a switching option associated with switching between: a first configuration that supports scheduling of uplink transmissions on only the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the first configuration, the first antenna port is associated with the first frequency band and the second antenna port is associated with the second frequency band, a second configuration that supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, and scheduling of uplink transmissions on only the first antenna port. The invention relates to a method of supporting scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the first antenna port, and scheduling of no uplink transmissions on the first antenna port or the second antenna port, wherein, in the second configuration, the first antenna port and the second antenna port are associated with the second frequency band, and a third configuration that supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the first antenna port, and scheduling of no uplink transmissions on the first antenna port or the second antenna port, wherein, in the third configuration, the first antenna port and the second antenna port are associated with the first frequency band.

[0136] Aspect 23: A method according to aspect 21, wherein the one or more switching options include a switching option associated with switching between: a first configuration that supports scheduling of concurrent uplink transmissions on a first antenna port and a second antenna port, scheduling of uplink transmissions on only the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein in the first configuration, the first antenna port is associated with the first frequency band and the second antenna port is associated with the second frequency band, and a second configuration that supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions only on the second antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein, in the second configuration, the first antenna port and the second antenna port are associated with the second frequency band, and a third configuration that supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions only on the first antenna port, and no uplink transmissions are scheduled on the first antenna port or the second antenna port, wherein, in the third configuration, the first antenna port and the second antenna port are associated with the first frequency band.

[0137] Aspect 24: An apparatus for wireless communication at a device, comprising a processor, a memory coupled to the processor, and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method according to one or more of Aspects 1-14.

[0138] Aspect 25: A device for wireless communication, comprising a memory, and one or more processors coupled to the memory, the one or more processors configured to execute the method according to one or more of aspects 1-14.

[0139] Aspect 26: An apparatus for wireless communication, comprising at least one unit for performing the method according to one or more of aspects 1-14.

[0140] Aspect 27: A non-transitory computer-readable medium storing a code for wireless communication, the code comprising instructions executable by a processor to perform the method according to one or more of aspects 1-14.

[0141] Aspect 28: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method according to one or more of aspects 1-14.

[0142] Aspect 29: An apparatus for wireless communication at a device, comprising a processor, a memory coupled to the processor, and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method according to one or more of Aspects 15-23.

[0143] Aspect 30: An apparatus for wireless communication, comprising a memory, and one or more processors coupled to the memory, the one or more processors configured to perform the method according to one or more of aspects 15-23.

[0144] Aspect 31: An apparatus for wireless communication, comprising at least one unit for performing the method according to one or more of aspects 15-23.

[0145] Aspect 32: A non-transitory computer-readable medium storing a code for wireless communication, the code comprising instructions executable by a processor to perform the method according to one or more of aspects 15-23.

[0146] Aspect 33: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform a method according to one or more of aspects 15-23.

[0147] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the various aspects to the precise forms disclosed. Modifications and changes may be made based on the above disclosure, or may be obtained from the practice of these aspects.

[0148] As used herein, the term "component" is intended to be broadly interpreted as a combination of hardware and / or hardware and software. Whether it is referred to as software, firmware, middleware, microcode, hardware description language or other names, software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, processes and / or functions, etc. As used herein, "processor" is implemented with a combination of hardware and / or hardware and software. It is obvious that the system and / or method described herein can be implemented with a combination of hardware and / or hardware and software in different forms. The actual dedicated control hardware or software code for implementing these systems and / or methods is not a limitation to these aspects. Because those skilled in the art will understand that software and hardware can be designed to implement the system and / or method based at least in part on the description herein, the operation and behavior of the system and / or method are described herein without reference to specific software codes.

[0149] As used herein, satisfying a threshold may refer to being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0150] Although specific combinations of features are listed in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. Many of these features can be combined in a manner not specifically listed in the claims and / or disclosed in the specification. The disclosure of various aspects includes each dependent claim combined with each other claim in the claim set. The phrase "at least one" mentioned in the list of items used herein refers to any combination of those items, including a single member. As an example, "at least one of a, b or c" is intended to cover: a, b, c, a+b, a+c, b+c and a+b+c, and any combination with multiple identical elements (e.g., a+a, a+a+a, a+a+b, a+a+c, a+b+b, a+c+c, b+b, b+b+b, b+b+c, c+c and c+c+c, or any other ordering of a, b and c.

[0151] Unless explicitly described, any element, behavior or instruction used in this article should not be interpreted as critical or necessary. And, as used in this article, the articles "one" and "an" are intended to include one or more items and can be used interchangeably with "one or more". In addition, as used in this article, the article "the" is intended to include one or more items related to the article "the", and can be used interchangeably with "one or more". In addition, as used in this article, the terms "set" and "group" are intended to include one or more items and can be used interchangeably with "one or more". In the case of meaning only one item, the phrase "only one" or similar language is used. And, as used in this article, the term "has", "have", "have (having)" or similar expressions are intended to be open terms, and they do not limit the elements they modify (for example, "an element with" A may also have B). . In addition, unless otherwise explicitly stated, the phrase "based on" is intended to mean "at least partially based on". Furthermore, as used herein, the term "or" when used in serial form is intended to be inclusive and can be used interchangeably with "and / or" unless expressly stated otherwise (eg, if followed by "either" or "only one of").

Claims

1. A method of wireless communication performed by a user equipment (UE), comprising: Sending an indication of one or more switching options supported by the UE, wherein the one or more switching options are associated with performing uplink transmission switching for a first frequency band and a second frequency band and include a switching option between the following port combinations: a first configuration that supports scheduling of uplink transmissions on only the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions being scheduled on the first antenna port or the second antenna port, wherein, in the first configuration, the first antenna port is associated with the first frequency band and the second antenna port is associated with the second frequency band, a second configuration that supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the second antenna port, and no uplink transmissions being scheduled on the first antenna port or the second antenna port, wherein, in the second configuration, the first antenna port and the second antenna port are associated with the second frequency band, and a third configuration that supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions being scheduled on the first antenna port or the second antenna port, wherein, in the third configuration, the first antenna port and the second antenna port are associated with the first frequency band; wherein at least one of the first frequency band or the second frequency band is a frequency division duplex (FDD) frequency band, a time division duplex (TDD) frequency band, or a supplemental uplink (SUL) frequency band, and wherein uplink multiple-input multiple-output (MIMO) is allowed on the first frequency band and the second frequency band; and after sending the indication of the one or more switching options, receiving information associated with an uplink transmission scheduled for the UE, wherein the uplink transmission is scheduled according to the one or more switching options supported by the UE.

2. The method according to claim 1, further comprising: An uplink transmission switch associated with transmitting the uplink transmission scheduled for the UE is performed, the uplink transmission switch being performed in accordance with the one or more switching options supported by the UE.

3. The method according to claim 1, wherein: The first frequency band is a first TDD frequency band and the second frequency band is a second TDD frequency band.

4. The method according to claim 1, wherein: At least one of the first frequency band or the second frequency band is an FDD frequency band.

5. The method according to claim 1, wherein: The second frequency band is a SUL frequency band, and uplink MIMO is enabled on the SUL frequency band.

6. The method according to claim 1 or 5, wherein: The first configuration also supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port.

7. The method according to claim 1, wherein: The UE is configured to anticipate that the uplink transmission is scheduled to provide sufficient time for the UE to perform uplink transmission switching associated with transmitting the uplink transmission according to a carrier aggregation slot offset value.

8. The method according to claim 1, further comprising: A handover scheduling error condition is identified based at least in part on a determination that the uplink transmission is not scheduled to provide sufficient time for the UE to perform the uplink transmission handover.

9. The method according to claim 1, further comprising: The performance of the uplink transmission switch associated with transmitting the uplink transmission is skipped based at least in part on a determination that the uplink transmission is not scheduled to provide sufficient time for the UE to perform the uplink transmission switch.

10. The method according to claim 1, wherein: The UE is configured for intra-band carrier aggregation (CA), and is configured to check a component carrier in a frequency band for intra-band CA in association with determining whether to perform uplink transmission switching.

11. A method of wireless communication performed by a base station, comprising: Receiving an indication of one or more switching options supported by a user equipment (UE), wherein the one or more switching options are associated with performing uplink transmission switching for a first frequency band and a second frequency band and include a switching option between the following port combinations: a first configuration that supports scheduling of uplink transmissions on only the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions being scheduled on the first antenna port or the second antenna port, wherein, in the first configuration, the first antenna port is associated with the first frequency band and the second antenna port is associated with the second frequency band, a second configuration that supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the second antenna port, and no uplink transmissions being scheduled on the first antenna port or the second antenna port, wherein, in the second configuration, the first antenna port and the second antenna port are associated with the second frequency band, and a third configuration that supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions being scheduled on the first antenna port or the second antenna port, wherein, in the third configuration, the first antenna port and the second antenna port are associated with the first frequency band; wherein at least one of the first frequency band or the second frequency band is a frequency division duplex (FDD) frequency band, a time division duplex (TDD) frequency band, or a supplemental uplink (SUL) frequency band, and wherein uplink multiple-input multiple-output (MIMO) is allowed on the first frequency band and the second frequency band; and after receiving the indication of the one or more switching options, information associated with an uplink transmission scheduled for the UE is sent, wherein the uplink transmission is scheduled according to the one or more switching options supported by the UE.

12. The method according to claim 11, wherein: The first frequency band is a first TDD frequency band and the second frequency band is a second TDD frequency band.

13. The method according to claim 11, wherein: At least one of the first frequency band or the second frequency band is an FDD frequency band.

14. The method according to claim 11, wherein: The second frequency band is a SUL frequency band, and uplink MIMO is enabled on the SUL frequency band.

15. The method according to claim 11 or 14, wherein: The first configuration also supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port.

16. An apparatus for wireless communication, comprising: Means for sending an indication of one or more switching options supported by the apparatus, wherein the one or more switching options are associated with performing uplink transmit switching for a first frequency band and a second frequency band and include switching options between the following port combinations: a first configuration that supports scheduling of uplink transmissions on only the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions being scheduled on the first antenna port or the second antenna port, wherein, in the first configuration, the first antenna port is associated with the first frequency band and the second antenna port is associated with the second frequency band, a second configuration that supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the second antenna port, and no uplink transmissions being scheduled on the first antenna port or the second antenna port, wherein, in the second configuration, the first antenna port and the second antenna port are associated with the second frequency band, and a third configuration that supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions being scheduled on the first antenna port or the second antenna port, wherein, in the third configuration, the first antenna port and the second antenna port are associated with the first frequency band; wherein at least one of the first frequency band or the second frequency band is a frequency division duplex (FDD) frequency band, a time division duplex (TDD) frequency band, or a supplemental uplink (SUL) frequency band, and wherein uplink multiple-input multiple-output (MIMO) is allowed on the first frequency band and the second frequency band; and a unit is used to receive information associated with an uplink transmission scheduled for the device after sending the indication of the one or more switching options, wherein the uplink transmission is scheduled according to the one or more switching options supported by the device.

17. The apparatus according to claim 16, further comprising: Means for performing uplink transmission switching associated with transmitting the uplink transmission scheduled for the apparatus, the uplink transmission switching being performed in accordance with the one or more switching options supported by the apparatus.

18. The device according to claim 16, wherein: The first frequency band is a first TDD frequency band and the second frequency band is a second TDD frequency band.

19. The device according to claim 16, wherein: At least one of the first frequency band or the second frequency band is an FDD frequency band.

20. The device according to claim 16, wherein: The second frequency band is a SUL frequency band, and uplink MIMO is enabled on the SUL frequency band.

21. The device according to claim 16 or 20, wherein: The first configuration also supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port.

22. An apparatus for wireless communication, comprising: Means for receiving an indication of one or more switching options supported by a user equipment (UE), wherein the one or more switching options are associated with performing uplink transmission switching for a first frequency band and a second frequency band and include switching options between the following port combinations: a first configuration that supports scheduling of uplink transmissions on only the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions being scheduled on the first antenna port or the second antenna port, wherein in the first configuration, the first antenna port is associated with the first frequency band and the second antenna port is associated with the second frequency band, a second configuration that supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the second antenna port, and no uplink transmissions being scheduled on the first antenna port or the second antenna port, wherein, in the second configuration, the first antenna port and the second antenna port are associated with the second frequency band, and a third configuration that supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port, scheduling of uplink transmissions on only the first antenna port, and no uplink transmissions being scheduled on the first antenna port or the second antenna port, wherein, in the third configuration, the first antenna port and the second antenna port are associated with the first frequency band; wherein at least one of the first frequency band or the second frequency band is a frequency division duplex (FDD) frequency band, a time division duplex (TDD) frequency band, or a supplemental uplink (SUL) frequency band, and wherein uplink multiple-input multiple-output (MIMO) is allowed on the first frequency band and the second frequency band; and a unit is used to send information associated with an uplink transmission scheduled for the UE after receiving the indication of the one or more switching options, wherein the uplink transmission is scheduled according to the one or more switching options supported by the UE.

23. The device according to claim 22, wherein: The first frequency band is a first TDD frequency band and the second frequency band is a second TDD frequency band.

24. The device according to claim 22, wherein: At least one of the first frequency band or the second frequency band is an FDD frequency band.

25. The device according to claim 22, wherein: The second frequency band is a SUL frequency band, and uplink MIMO is enabled on the SUL frequency band.

26. The device according to claim 22 or 25, wherein: The first configuration also supports scheduling of concurrent uplink transmissions on the first antenna port and the second antenna port.

Images