Patent Application
20250070874
Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for feedback for visible light communication (VLC) transmissions.
Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, or the like). Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).
A wireless network may include one or more base stations that support communication for a user equipment (UE) or multiple UEs. A UE may communicate with a base station via downlink communications and uplink communications. “Downlink” (or “DL”) refers to a communication link from the base station to the UE, and “uplink” (or “UL”) refers to a communication link from the UE to the base station.
The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different UEs to communicate on a municipal, national, regional, and/or global level. New Radio (NR), which may be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the 3GPP. NR is designed to better support mobile broadband internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) 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, as well as 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.
In some implementations, an apparatus for wireless communication at a user equipment (UE) includes a photo detector or an image sensor; a transceiver; a memory: and one or more processors, coupled to the memory, configured to: receive, from a base station via the photo detector or the image sensor, a downlink visible light communication (VLC) transmission; receive, from the base station via the transceiver, a downlink New Radio (NR) radio frequency (RF) based communication (RFC) transmission, wherein a frame structure associated with the downlink VLC transmission is asynchronous with a frame structure associated with the downlink NR RFC transmission; and transmit, to the base station via the transceiver and via an uplink RF transmission based at least in part on a lack of support for an uplink VLC transmission at the UE, acknowledgement or negative acknowledgement (ACK/NACK) feedback associated with one or more of the downlink VLC transmission or the downlink NR RFC transmission.
In some implementations, an apparatus for wireless communication at a base station includes a light emitting diode (LED) or a laser diode; a transceiver; a memory; and one or more processors, coupled to the memory, configured to: transmit, to a UE via the LED or the laser diode, a downlink VLC transmission; transmit, to the UE via the transceiver, a downlink NR RFC transmission, wherein a frame structure associated with the downlink VLC transmission is asynchronous with a frame structure associated with the downlink NR RFC transmission; and receive, from the UE via the transceiver and via an uplink RF transmission based at least in part on a lack of support for an uplink VLC transmission at the UE, ACK/NACK feedback associated with one or more of the downlink VLC transmission or the downlink NR RFC transmission.
In some implementations, a method of wireless communication performed by a UE includes receiving, from a base station, a downlink VLC transmission; receiving, from the base station, a downlink NR RFC transmission, wherein a frame structure associated with the downlink VLC transmission is asynchronous with a frame structure associated with the downlink NR RFC transmission; and transmitting, to the base station via an uplink RF transmission based at least in part on a lack of support for an uplink VLC transmission at the UE, ACK/NACK feedback associated with one or more of the downlink VLC transmission or the downlink NR RFC transmission.
In some implementations, a method of wireless communication performed by a base station includes transmitting, to a UE, a downlink VLC transmission; transmitting, to the UE, a downlink NR RFC transmission, wherein a frame structure associated with the downlink VLC transmission is asynchronous with a frame structure associated with the downlink NR RFC transmission; and receiving, from the UE via an uplink RF transmission based at least in part on a lack of support for an uplink VLC transmission at the UE, ACK/NACK feedback associated with one or more of the downlink VLC transmission or the downlink NR RFC transmission.
In some implementations, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: receive, from a base station, a downlink VLC transmission; receive, from the base station, a downlink NR RFC transmission, wherein a frame structure associated with the downlink VLC transmission is asynchronous with a frame structure associated with the downlink NR RFC transmission; and transmit, to the base station via an uplink RF transmission based at least in part on a lack of support for an uplink VLC transmission at the UE, ACK/NACK feedback associated with one or more of the downlink VLC transmission or the downlink NR RFC transmission.
In some implementations, a non-transitory computer-readable medium storing a set of instructions 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: transmit, to a UE, a downlink VLC transmission; transmit, to the UE, a downlink NR RFC transmission, wherein a frame structure associated with the downlink VLC transmission is asynchronous with a frame structure associated with the downlink NR RFC transmission; and receive, from the UE via an uplink RF transmission based at least in part on a lack of support for an uplink VLC transmission at the UE, ACK/NACK feedback associated with one or more of the downlink VLC transmission or the downlink NR RFC transmission.
In some implementations, an apparatus for wireless communication includes means for receiving, from a base station, a downlink VLC transmission; means for receiving, from the base station, a downlink NR RFC transmission, wherein a frame structure associated with the downlink VLC transmission is asynchronous with a frame structure associated with the downlink NR RFC transmission; and means for transmitting, to the base station via an uplink RF transmission based at least in part on a lack of support for an uplink VLC transmission at the apparatus, ACK/NACK feedback associated with one or more of the downlink VLC transmission or the downlink NR RFC transmission.
In some implementations, an apparatus for wireless communication includes means for transmitting, to a UE, a downlink VLC transmission; means for transmitting, to the UE, a downlink NR RFC transmission, wherein a frame structure associated with the downlink VLC transmission is asynchronous with a frame structure associated with the downlink NR RFC transmission; and means for receiving, from the UE via an uplink RF transmission based at least in part on a lack of support for an uplink VLC transmission at the UE, ACK/NACK feedback associated with one or more of the downlink VLC transmission or the downlink NR RFC transmission.
Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication device, and/or processing system as substantially described herein with reference to and as illustrated by the drawings and specification.
The foregoing has outlined rather broadly the features and technical advantages of examples according to the disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The conception and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. Characteristics of the concepts disclosed herein, both their organization and method of operation, together with associated advantages, will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purposes of illustration and description, and not as a definition of the limits of the claims.
While aspects are described in the present disclosure by illustration to some examples, those skilled in the art will understand that such aspects may be implemented in many different arrangements and scenarios. Techniques described herein may be implemented using different platform types, devices, systems, shapes, sizes, and/or packaging arrangements. For example, some aspects may be implemented via integrated chip embodiments or other non-module-component based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail/purchasing devices, medical devices, and/or artificial intelligence devices). Aspects may be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, and/or system-level components. Devices incorporating described aspects and features may include additional components and features for implementation and practice of claimed and described aspects. For example, 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 aspects described herein may be practiced in a wide variety of devices, components, systems, distributed arrangements, and/or end-user devices of varying size, shape, and constitution.
So that the above-recited features of the present disclosure can be understood in detail, a more particular description, briefly summarized above, may be had by reference to aspects, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only certain typical aspects of this disclosure and are therefore not to be considered limiting of its scope, for the description may admit to other equally effective aspects. The same reference numbers in different drawings may identify the same or similar elements.
Various aspects of the disclosure are described more fully hereinafter with reference to the accompanying drawings. This disclosure may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. One skilled in the art should appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the disclosure. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method which is practiced using other structure, functionality, or structure and functionality in addition to or other than the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.
Several aspects of telecommunication systems will now be presented with reference to various apparatuses and techniques. These apparatuses 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, or the like (collectively referred to as “elements”). These elements may be implemented using hardware, software, or combinations thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.
While aspects may be described herein using terminology commonly associated with a 5G or New Radio (NR) radio access technology (RAT), aspects of the present disclosure can be applied to other RATs, such as a 3G RAT, a 4G RAT, and/or a RAT subsequent to 5G (e.g., 6G).
A base station 110 may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs 120 with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs 120 with service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs 120 having association 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 an in-home base station. In the example shown in
In some examples, a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a base station 110 that is mobile (e.g., a mobile base station). In some examples, the base stations 110 may be interconnected to one another and/or to one or more other base stations 110 or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces, such as a direct physical connection or a virtual network, using any suitable transport network.
The wireless network 100 may include one or more relay stations. A relay station is an entity that can receive a transmission of data from an upstream station (e.g., a base station 110 or a UE 120) and send a transmission of the data to a downstream station (e.g., a UE 120 or a base station 110). A relay station may be a UE 120 that can relay transmissions for other UEs 120. In the example shown in
The wireless network 100 may be a heterogeneous network that includes base stations 110 of different types, such as macro base stations, pico base stations, femto base stations, relay base stations, or the like. 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, macro base stations may have a high transmit power level (e.g., 5 to 40 watts) whereas pico base stations, femto base stations, and relay base stations may have lower transmit power levels (e.g., 0.1 to 2 watts).
A network controller 130 may couple to or communicate with a set of base stations 110 and may provide coordination and control for these base stations 110. The network controller 130 may communicate with the base stations 110 via a backhaul communication link. The base stations 110 may communicate with one another directly or indirectly via a wireless or wireline backhaul communication link.
The UEs 120 may be dispersed throughout the wireless network 100, and each UE 120 may be stationary or mobile. A UE 120 may include, for example, an access terminal, a terminal, a mobile station, and/or a subscriber unit. A UE 120 may 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, 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 or a smart bracelet)), an entertainment device (e.g., a music device, a video device, and/or a satellite radio), a vehicular component or sensor, a smart meter/sensor, industrial manufacturing equipment, a global positioning system device, and/or any other suitable device that is configured to communicate via a wireless medium.
Some UEs 120 may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. An MTC UE and/or an eMTC UE may include, for example, a robot, a drone, a remote device, a sensor, a meter, a monitor, and/or a location tag, that may communicate with a base station, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered Internet-of-Things (IoT) devices, and/or may be implemented as NB-IoT (narrowband IoT) devices. Some UEs 120 may be considered a Customer Premises Equipment. A UE 120 may be included inside a housing that houses components of the UE 120, such as processor components and/or memory components. In some examples, the processor components and the memory components may be coupled together. For example, the processor components (e.g., one or more processors) and the memory components (e.g., a memory) may be operatively coupled, communicatively coupled, electronically coupled, and/or electrically coupled.
In general, any number of wireless networks 100 may be deployed in a given geographic area. Each wireless network 100 may support a particular RAT and may operate on one or more frequencies. A RAT may be referred to as a radio technology, an air interface, or the like. A frequency may be referred to as a carrier, a frequency channel, or the like. Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.
In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using a base station 110 as an intermediary to communicate with one another). For example, the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, or a vehicle-to-pedestrian (V2P) protocol), and/or a mesh network. In such examples, a UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station 110.
Devices of the wireless network 100 may communicate using the electromagnetic spectrum in the radio frequency (RF) range, which may be subdivided by frequency or wavelength into various classes, bands, channels, or the like. For example, devices of the wireless network 100 may communicate using one or more operating bands. In 5G NR, two initial operating bands have been identified as frequency range designations 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 a “Sub-6 GHz” band in various documents and articles. A similar nomenclature issue sometimes occurs with regard to FR2, which is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz-300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.
The frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR studies have identified an operating band for these mid-band frequencies as frequency range designation FR3 (7.125 GHZ-24.25 GHZ). Frequency bands falling within FR3 may inherit FR1 characteristics and/or FR2 characteristics, and thus may effectively extend features of FR1 and/or FR2 into mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating bands have been identified as 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.
With the above examples in mind, unless specifically stated otherwise, it should be understood that the term “sub-6 GHz” or the like, if used herein, may broadly represent frequencies that may be less than 6 GHZ, may be within FR1, or may include mid-band frequencies. Further, unless specifically stated otherwise, it should be understood that the term “millimeter wave” or the like, if used herein, may broadly represent frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a or FR4-1, and/or FR5, or may 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) may be modified, and techniques described herein are applicable to those modified frequency ranges.
In some aspects, a UE (e.g., UE 120) may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may receive via a photo detector 121 or an image sensor 122, from a base station, a downlink visible light communication (VLC) transmission; receive, from the base station, a downlink NR RF-based communication (RFC) transmission, wherein a frame structure associated with the downlink VLC transmission is asynchronous with a frame structure associated with the downlink NR RFC transmission; and transmit, to the base station via an uplink RF transmission based at least in part on a lack of support for an uplink VLC transmission at the UE, acknowledgement or negative acknowledgement (ACK/NACK) feedback associated with one or more of the downlink VLC transmission or the downlink NR RFC transmission. Additionally, or alternatively, the communication manager 140 may perform one or more other operations described herein.
In some aspects, a base station (e.g., base station 110) may include a communication manager 150. As described in more detail elsewhere herein, the communication manager 150 may transmit via a light emitting diode (LED) 111 or a laser diode 112, to a UE, a downlink VLC transmission; transmit, to the UE, a downlink NR RFC transmission, wherein a frame structure associated with the downlink VLC transmission is asynchronous with a frame structure associated with the downlink NR RFC transmission; and receive, from the UE via an uplink RF transmission based at least in part on a lack of support for an uplink VLC transmission at the UE, ACK/NACK feedback associated with one or more of the downlink VLC transmission or the downlink NR RFC transmission. Additionally, or alternatively, the communication manager 150 may perform one or more other operations described herein.
As indicated above,
At the base station 110, a transmit processor 220 may receive data, from a data source 212, intended for the UE 120 (or a set of UEs 120). The transmit processor 220 may select one or more modulation and coding schemes (MCSs) for the UE 120 based at least in part on one or more channel quality indicators (CQIs) received from that 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(s) 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., a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS)) and synchronization signals (e.g., a primary synchronization signal (PSS) or a secondary synchronization signal (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modems), shown as modems 232a through 232t. For example, each output symbol stream may be provided to a modulator component (shown as MOD) of a modem 232. Each modem 232 may use a respective modulator component to process a respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modem 232 may further use a respective 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 through 232t may transmit a set of downlink signals (e.g., T downlink signals) via a corresponding set of antennas 234 (e.g., T antennas), shown as antennas 234a through 234t.
At the UE 120, a set of antennas 252 (shown as antennas 252a through 252r) may receive the downlink signals from the base station 110 and/or other base stations 110 and may 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 through 254r. For example, each received signal may be provided to a demodulator component (shown as DEMOD) of a modem 254. Each modem 254 may use a respective demodulator component to condition (e.g., filter, amplify, downconvert, and/or digitize) a received signal to obtain input samples. Each modem 254 may use a demodulator component to further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from the modems 254, may perform MIMO detection on the received symbols if applicable, and may provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, may provide decoded data for the UE 120 to a data sink 260, and may provide decoded control information and system information to a controller/processor 280. The term “controller/processor” may refer to one or more controllers, one or more processors, or a combination thereof. A 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 examples. In some examples, one or more components of the UE 120 may be included in a housing 284.
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.
One or more antennas (e.g., antennas 234a through 234t and/or antennas 252a through 252r) may include, or may be included within, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and/or one or more antenna arrays, among other examples. An antenna panel, an antenna group, a set of antenna elements, and/or an antenna array may include one or more antenna elements (within a single housing or multiple housings), a set of coplanar antenna elements, a set of non-coplanar antenna elements, and/or one or more antenna elements coupled to one or more transmission and/or reception components, such as one or more components of
On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports that include RSRP, RSSI, RSRQ, and/or CQI) from the controller/processor 280. 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 a TX MIMO processor 266 if applicable, further processed by the modems 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 the antenna(s) 252, the modem(s) 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, and/or the TX MIMO processor 266. The transceiver may be used by a processor (e.g., the controller/processor 280) and the memory 282 to perform aspects of any of the methods described herein (e.g., with reference to
At the base station 110, the uplink signals from UE 120 and/or other UEs may be received by the antennas 234, processed by the modem 232 (e.g., a demodulator component, shown as DEMOD, of the modem 232), detected by a MIMO detector 236 if applicable, and further processed by a 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 a data sink 239 and provide 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 to schedule 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 the antenna(s) 234, the modem(s) 232, the MIMO detector 236, the receive processor 238, the transmit processor 220, and/or the TX MIMO processor 230. The transceiver may be used by a processor (e.g., the controller/processor 240) and the memory 242 to perform aspects of any of the methods described herein (e.g., with reference to
The controller/processor 240 of the base station 110, the controller/processor 280 of the UE 120, and/or any other component(s) of
In some aspects, a UE (e.g., UE 120) includes means for receiving, from a base station, a downlink VLC transmission (e.g., using receive processor 258, controller/processor 280, memory 282, photo detector 121 (as shown in
In some aspects, a base station (e.g., base station 110) includes means for transmitting, to a UE, a downlink VLC transmission (e.g., using controller/processor 240, transmit processor 220, memory 242, LED 111 (as shown in
While blocks in
As indicated above,
Visible light communications (VLCs) may be an alternative to radio-based communications, especially for indoor communications. A VLC transmitter may transmit data via an LED that varies in intensity. A VLC receiver may include a photo detector that detects light emitted from the VLC transmitter. The VLC receiver may produce an electrical signal composed of a message and noise based at least in part on the light detected via the photo detector. The photo detector in the VLC receiver may be a photo diode or an image sensor.
As shown in
As indicated above,
A UE (e.g., a smartphone or watch) may be equipped with a photo detector and/or an image sensor (e.g., as part of a camera of the UE), which may be used to receive downlink VLC transmissions. The UE may support downlink VLC transmissions but not uplink VLC transmissions. When the UE supports the downlink VLC transmissions but not the uplink VLC transmissions, a reliability of the downlink VLC transmissions cannot be guaranteed due to a lack of feedback signaling in VLC. In other words, the reliability of the downlink VLC transmissions may not be guaranteed since the UE may not support uplink VLC transmissions for feedback signaling. The feedback signaling may involve the UE indicating an ACK or a NACK based at least in part on the downlink VLC transmissions. The UE may be unable to perform the feedback signaling when the uplink VLC transmissions are not supported.
In various aspects of techniques and apparatuses described herein, a UE may receive, from a base station, a downlink VLC transmission. The UE may receive, from the base station, a downlink NR RFC transmission. A frame structure associated with the downlink VLC transmission may be asynchronous with a frame structure associated with the downlink NR RFC transmission. The UE may transmit, to the base station via an uplink RF transmission, ACK/NACK feedback associated with the downlink VLC transmission and/or the downlink NR RFC transmission. The UE may transmit the ACK/NACK feedback via the uplink RF transmission based at least in part on a lack of support for an uplink VLC transmission at the UE. In some aspects, the UE may be configured for NR-VLC dual connectivity and/or NR-VLC carrier aggregation. The UE may transmit the ACK/NACK feedback for the downlink VLC transmission and/or the downlink NR RFC transmission, which may improve a reliability of the downlink VLC transmission for the UE that does not support the uplink VLC transmission.
In some aspects, the UE may support a coexistence of VLC and NR based at least in part on an asynchronous signaling design, due to the different frame structure and (e.g., a different frame length) for VLC as compared to NR. The UE may support VLC-NR dual connectivity and VLC-NR carrier aggregation, which may allow the UE to provide feedback via NR when the UE does not support uplink VLC transmissions. As a result, the UE may support a higher reliability for the downlink VLC transmission. Further, transmitting the feedback for the downlink VLC transmissions via NR would not be apparent due to the different frame structure and the different frame length for VLC as compared to NR, which necessitates the asynchronized signaling design.
As shown by reference number 402, the UE may transmit via a transceiver of the UE, to the base station, a UE capability report that includes a first parameter and a second parameter. The first parameter may indicate that the UE supports a downlink VLC transmission and the second parameter may indicate that the UE does not support an uplink VLC transmission. In some aspects, the UE may be configured for an NR-VLC carrier aggregation or an NR-VLC dual connectivity.
In some aspects, a UE capability information element (IE) may indicate two parameters associated with the UE reporting whether downlink VLC transmissions and/or uplink VLC transmissions are supported or not. The first parameter may indicate to the base station whether the downlink VLC transmissions are supported. The second parameter may indicate to the base station whether the uplink VLC transmissions are supported. In some aspects, the UE capability IE may include the first parameter, which may indicate that the UE supports the downlink VLC transmissions, and the UE capability IE may include the second parameter, which may indicate that the UE does not support the uplink VLC transmissions.
In some aspects, the UE capability report may indicate a maximum supported quantity of hybrid automatic repeat request (HARQ) processes. In some aspects, the UE capability report may indicate a maximum quantity of HARQ processes for both downlink NR RFC transmissions and downlink VLC transmissions. In some aspects, the UE capability report may indicate a first quantity indicating a maximum quantity of HARQ processes for downlink NR RFC transmissions and a second quantity indicating a maximum quantity of HARQ processes for downlink VLC transmissions. In some aspects, the UE capability report may indicate a first quantity indicating a maximum quantity of HARQ processes for both downlink NR RFC transmissions and downlink VLC transmissions, and a second quantity indicating a maximum quantity of HARQ processes for downlink VLC transmissions. In some aspects, the UE capability report may indicate a first quantity indicating a maximum quantity of HARQ processes for both downlink NR RFC transmissions and downlink VLC transmissions, and a second quantity indicating a maximum quantity of HARQ processes for downlink NR RFC transmissions.
In some aspects, a larger quantity of maximum HARQ processes may be considered for VLC as compared to NR, especially when a backhaul delay is relatively large between NR and VLC. The UE may transmit, to the base station, the UE capability report that indicates the maximum quantity of HARQ processes that are supported by the UE. In some aspects, the UE capability report may indicate the maximum quantity of HARQ processes for both downlink NR RFC transmissions and downlink VLC transmissions. In some aspects, the UE capability report may indicate the first quantity indicating the maximum quantity of HARQ processes for the downlink NR RFC transmissions and the second quantity indicating the maximum quantity of HARQ processes for the downlink VLC transmissions. In some aspects, the UE capability report may indicate the first quantity indicating the maximum quantity of HARQ processes for both downlink NR RFC transmissions and downlink VLC transmissions, and the second quantity indicating the maximum quantity of HARQ processes for the downlink VLC transmissions. In some aspects, the UE capability report may indicate the first quantity indicating the maximum quantity of HARQ processes for both downlink NR RFC transmissions and downlink VLC transmissions, and the second quantity indicating the maximum quantity of HARQ processes for the downlink NR RFC transmissions.
As shown by reference number 404, the UE may receive, from the base station, the downlink VLC transmission. The UE may receive the downlink VLC transmission based at least in part on the UE capability report. The UE may receive the downlink VLC transmission via a photodetector or an image sensor of the UE. The base station may transmit the downlink VLC transmission via a light emitting diode or a laser diode of the base station.
As shown by reference number 406, the UE may receive via the transceiver of the UE, from the base station, a downlink NR RFC transmission. A frame structure associated with the downlink VLC transmission may be asynchronous with a frame structure associated with the downlink NR RFC transmission. In other words, the frame structure associated with the downlink VLC transmission may not be synchronized with the frame structure associated with the downlink NR RFC transmission.
In some aspects, the base station may transmit the downlink VLC transmission and the downlink NR RFC transmission. In other words, a same base station may transmit the downlink VLC transmission and the downlink NR RFC transmission. In some aspects, based at least in part on a centralized unit (CU), distributed unit (DU), and radio unit (RU) split of the base station, the CU and the DU may be common for the downlink VLC transmission and the downlink NR RFC transmission. In some cases, the downlink VLC transmission may use an appropriate unit for VLC communication and the downlink NR RFC transmission may use an RU that is separate from the unit used for the VLC communication.
As shown by reference number 408, the UE may transmit via the transceiver of the UE, to the base station via an uplink RF transmission based at least in part on a lack of support for an uplink VLC transmission at the UE, ACK/NACK feedback associated with the downlink VLC transmission and/or the downlink NR RFC transmission. The UE may transmit the ACK/NACK feedback via the uplink RF transmission and not via the uplink VLC transmission, which may not be supported at the UE.
In some aspects, the UE may transmit a MAC-CE that indicates the ACK/NACK feedback for the downlink VLC transmission and not for the downlink NR RFC transmission. The MAC-CE may be configured in a semi-persistent scheduling (SPS) configuration IE based at least in part on the UE being configured with an SPS downlink VLC transmission. The MAC-CE may be triggered by a medium access control (MAC) transmit entity at the base station based at least in part on the downlink VLC transmission being dynamically scheduled for the UE. In some aspects, the UE may transmit, for a HARQ process, the ACK/NACK feedback that bundles feedback for both the downlink VLC transmission and the downlink NR RFC transmission. The downlink NR RFC transmission and the downlink VLC transmission may be associated with a same MAC entity of the UE.
In some aspects, the ACK/NACK feedback may be associated with a first HARQ-ACK codebook for the downlink VLC transmission and a second HARQ-ACK codebook for the downlink NR RFC transmission. In some aspects, the ACK/NACK feedback may be associated with a single HARQ-ACK codebook for both the downlink VLC transmission and the downlink NR RFC transmission. In some aspects, the ACK/NACK feedback may be associated with a single HARQ-ACK codebook for both the downlink VLC transmission and the downlink NR RFC transmission, where a downlink assignment indicator (DAI) that is indexed based at least in part on a slot beginning boundary is separately indexed for the downlink VLC transmission and the downlink NR RFC transmission.
In some aspects, a HARQ-ACK codebook type may be separately configured for the downlink VLC transmission and the downlink NR RFC transmission based at least in part on the ACK/NACK feedback being a layer 1 (L1) ACK/NACK feedback. The two separate HARQ-ACK codebooks may be fed back via the uplink RF transmission. The two separate HARQ-ACK codebooks may include a dynamic codebook for the downlink NR RFC transmission and a semi-static codebook for the downlink VLC transmission. The two separate HARQ-ACK codebooks may include a dynamic codebook for the downlink NR RFC transmission and a dynamic codebook for the downlink VLC transmission. The two separate HARQ-ACK codebooks may include a semi-static codebook for the downlink NR RFC transmission and a semi-static codebook for the downlink VLC transmission. The two separate HARQ-ACK codebooks may include a semi-static codebook for the downlink NR RFC transmission and a dynamic codebook for the downlink VLC transmission.
In some aspects, the DAI, including a counter downlink assignment index (cDAI) and a total downlink assignment index (tDAI), may be indexed based at least in part on a slot beginning boundary. A dedicated HARQ-ACK codebook may contain feedback of transport blocks (TBs), which may finish a transmission before an uplink slot beginning boundary. In some aspects, the HARQ-ACK codebook for RF and VLC may be separated (e.g., two codebooks). In some aspects, the HARQ-ACK codebook for RF and VLC may be combined (e.g., one codebook). In some examples, the DAI for RF and VLC may be separately indexed, but a single HARQ-ACK codebook may be used. The dedicated HARQ-ACK codebooks for bundled NR and VLC feedback may support the higher reliability of the downlink VLC transmission.
In some aspects, when the L1 ACK/NACK feedback is used for VLC, two HARQ-ACK codebook types may be separately configured for RFC and VLC. The two separate HARQ-ACK codebooks may be fed back through separate uplink RF transmissions. In some aspects, a dynamic codebook may be used for NR and a semi-static codebook may be used for VLC. In some aspects, a dynamic codebook may be used for NR and a dynamic codebook may be used for VLC. In some aspects, a semi-static codebook may be used for NR and a semi-static codebook may be used for VLC. In some aspects, a semi-static codebook may be used for NR and a dynamic codebook may be used for VLC.
In some aspects, the UE may transmit, for each radio link control (RLC) protocol data unit (PDU), the ACK/NACK feedback in an RLC status PDU that bundles feedback for both the downlink VLC transmission and the downlink NR RFC transmission. The RLC status PDU may be based at least in part on data received from an RF MAC entity of the UE and a VLC MAC entity of the UE. The downlink NR RFC transmission and the downlink VLC transmission may be associated with a same RLC entity of the UE.
As indicated above,
In some aspects, a base station may be associated with a packet data convergence control (PDCP) layer, an RLC layer, a MAC layer, a first physical (PHY) layer, and a second PHY layer. A UE may be associated with a PDCP layer, an RLC layer, a MAC layer, a first PHY layer, and a second PHY layer.
In some aspects, the base station may transmit a downlink VLC transmission to the UE. The base station may transmit the downlink VLC transmission via the second PHY layer of the base station, and the UE may receive the downlink VLC transmission via the second PHY layer of the UE. The second PHY layer of the base station and the second PHY layer of the UE may be associated with downlink VLC transmissions, and the first PHY layer of the base station and the first PHY layer of the UE may be associated with uplink and/or downlink NR transmissions, where the downlink VLC transmissions may not be clock or frame synchronized with the NR transmissions. In other words, VLC transmissions may be asynchronous with the NR transmissions.
In some aspects, the UE may transmit a MAC-CE ACK/NACK feedback based at least in part on the downlink VLC transmission. A MAC-CE may be used to convey ACK/NACK feedback when the VLC transmissions are not clock or frame synchronized with the NR transmissions. The UE may transmit the MAC-CE ACK/NACK feedback rather than transmitting an L1 ACK/NACK feedback for VLC. The UE may transmit the MAC-CE ACK/NACK feedback via the first PHY layer of the UE. Further, the base station may transmit downlink RF transmissions via the first PHY layer of the base station, and the UE may receive the downlink RF transmissions from the base station via the first PHY layer of the UE.
In some aspects, a VLC HARQ ACK/NACK MAC-CE may be designed depending on whether the UE is configured with SPS VLC transmissions or dynamic scheduled VLC transmissions. When the UE is configured with the SPS VLC transmissions, the VLC HARQ ACK/NACK MAC-CE may be configured in an SPS configuration IE. When the UE is configured with the dynamically scheduled VLC transmissions (e.g., a VLC transmission is dynamically scheduled by the UE), the VLC HARQ ACK/NACK MAC-CE may be triggered by a MAC Tx entity at the base station.
As indicated above,
In some aspects, a base station may transmit a downlink VLC transmission to a UE. The base station may transmit the downlink VLC transmission via a second PHY layer of the base station, and the UE may receive the downlink VLC transmission via a second PHY layer of the UE. The second PHY layer of the base station and the second PHY layer of the UE may be associated with downlink VLC transmissions, and a first PHY layer of the base station and a first PHY layer of the UE may be associated with uplink and/or downlink NR transmissions, where the downlink VLC transmissions may not be clock or frame synchronized (e.g., asynchronous) with the NR transmissions.
In some aspects, the base station may transmit a downlink RF transmission via the first PHY layer of the base station, and the UE may receive the downlink RF transmission from the base station via the first PHY layer of the UE.
In some aspects, in an NR-VLC carrier aggregation, the UE may transmit L1 ACK/NACK feedback via the first PHY layer of the UE, and the base station may receive the L1 ACK/NACK feedback via the first PHY layer of the base station. The L1 ACK/NACK feedback may be for each HARQ process, including RF transmissions and downlink VLC transmissions. In other words, the L1 ACK/NACK feedback may be a bundled feedback for both the downlink VLC transmission and the downlink RF transmission. The UE may transmit the L1 ACK/NACK feedback via an uplink RF transmission to the base station. The RF transmissions and the downlink VLC transmissions may use a same MAC entity.
In some aspects, dedicated HARQ-ACK codebooks for bundled NR and VLC feedback may support a higher reliability for the downlink VLC transmission. The dedicated HARQ-ACK codebooks may differ from a legacy NR HARQ-ACK codebook, based at least in part on a different frame structure and a different frame/slot length for VLC transmissions as compared to NR transmissions, which requires an asynchronized signaling design.
As indicated above,
In some aspects, a base station may be associated with a PDCP layer, an RLC layer, a first MAC layer, a second MAC layer, a first PHY layer, and a second PHY layer. A UE may be associated with a PDCP layer, an RLC layer, a first MAC layer, a second MAC layer, a first PHY layer, and a second PHY layer.
In some aspects, a base station may transmit a downlink VLC transmission to a UE. The base station may transmit the downlink VLC transmission via a second PHY layer of the base station, and the UE may receive the downlink VLC transmission via a second PHY layer of the UE. The second PHY layer of the base station and the second PHY layer of the UE may be associated with downlink VLC transmissions, and a first PHY layer of the base station and a first PHY layer of the UE may be associated with uplink and/or downlink NR transmissions, where the downlink VLC transmissions may not be clock or frame synchronized (e.g., asynchronous) with the NR transmissions.
In some aspects, the base station may transmit a downlink RF transmission via the first PHY layer of the base station, and the UE may receive the downlink RF transmission from the base station via the first PHY layer of the UE.
In some aspects, in an NR-VLC dual connectivity configuration, the UE may transmit RLC ACK/NACK feedback via the first PHY layer of the UE, and the base station may receive the RLC ACK/NACK feedback via the first PHY layer of the base station. The ACK/NACK feedback may be for each RLC PDU, including the downlink RF transmission and the downlink VLC transmission. The ACK/NACK feedback may be a bundled feedback for both the downlink VLC transmission and the downlink RF transmission. The UE may transmit the ACK/NACK feedback in an RLC status PDU via an uplink RF transmission to the base station. In other words, the UE may transmit the ACK/NACK feedback as RLC feedback. The downlink RF transmission and the downlink VLC transmission may use a same RLC entity. An RLC status PDU feedback based at least in part on VLC may be supported by RLC layers of the base station and the UE.
In some aspects, the base station may include an X2 interface between the RLC layer of the base station (e.g., an RF RLC entity) and the second MAC layer of the base station (e.g., a VLC MAC entity), which is different from a legacy NR dual connectivity configuration that includes an X2 interface between a PDCP entity in a first path and an RLC entity in a second path.
In some aspects, the RLC layer of the UE may include an RLC receiving entity and an RLC transmitting entity. The RLC receiving entity may receive data from the first MAC layer of the UE (e.g., an RF MAC entity) and the second MAC layer of the UE (e.g., a VLC MAC entity). The RLC receiving entity may generate the RLC status PDU for both an RF path associated with the downlink RF transmission and a VLC path associated with the downlink VLC transmission. The RLC receiving entity may send the RLC status PDU to the RLC transmitting entity through the RF path. The RLC transmitting entity may receive the RLC status PDU from the RLC receiving entity. The RLC transmitting entity may conduct a layer 2 (L2) retransmission based at least in part on the RLC status PDU for improved reliability. As a result, an NR-VLC dual connectivity protocol stack may support higher reliability of the downlink VLC transmission based at least in part on RLC ACK/NACK feedback.
As indicated above,
As shown in
As further shown in
As further shown in
Process 800 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.
In a first aspect, process 800 includes transmitting, to the base station, a UE capability report that includes a first parameter and a second parameter, wherein the first parameter indicates that the UE supports the downlink VLC transmission and the second parameter indicates that the UE does not support the uplink VLC transmission.
In a second aspect, alone or in combination with the first aspect, process 800 includes transmitting a MAC-CE that indicates the ACK/NACK feedback for the downlink VLC transmission and not for the downlink NR RFC transmission, and the MAC-CE is configured in an SPS configuration IE based at least in part on the UE being configured with an SPS downlink VLC transmission, or the MAC-CE is triggered by a MAC transmit entity at the base station based at least in part on the downlink VLC transmission being dynamically scheduled for the UE.
In a third aspect, alone or in combination with one or more of the first and second aspects, process 800 includes transmitting, to the base station, a UE capability report that indicates a maximum supported quantity of HARQ processes, wherein the UE capability report indicates a maximum quantity of HARQ processes for both downlink NR RFC transmissions and downlink VLC transmissions, the UE capability report indicates a first quantity indicating a maximum quantity of HARQ processes for downlink NR RFC transmissions and a second quantity indicating a maximum quantity of HARQ processes for downlink VLC transmissions, the UE capability report indicates a first quantity indicating a maximum quantity of HARQ processes for both downlink NR RFC transmissions and downlink VLC transmissions, and a second quantity indicating a maximum quantity of HARQ processes for downlink VLC transmissions, or the UE capability report indicates a first quantity indicating a maximum quantity of HARQ processes for both downlink NR RFC transmissions and downlink VLC transmissions, and a second quantity indicating a maximum quantity of HARQ processes for downlink NR RFC transmissions.
In a fourth aspect, alone or in combination with one or more of the first through third aspects, process 800 includes transmitting, for a HARQ process, the ACK/NACK feedback that bundles feedback for both the downlink VLC transmission and the downlink NR RFC transmission, and the downlink NR RFC transmission and the downlink VLC transmission are associated with a same MAC entity of the UE.
In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the ACK/NACK feedback is associated with a first HARQ-ACK codebook for the downlink VLC transmission and a second HARQ-ACK codebook for the downlink NR RFC transmission, the ACK/NACK feedback is associated with a single HARQ-ACK codebook for both the downlink VLC transmission and the downlink NR RFC transmission, or the ACK/NACK feedback is associated with a single HARQ-ACK codebook for both the downlink VLC transmission and the downlink NR RFC transmission, wherein a DAI that is indexed based at least in part on a slot beginning boundary is separately indexed for the downlink VLC transmission and the downlink NR RFC transmission.
In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, a HARQ-ACK codebook type is separately configured for the downlink VLC transmission and the downlink NR RFC transmission based at least in part on the ACK/NACK feedback being the ACK/NACK feedback, and two separate HARQ-ACK codebooks are fed back via the uplink RF transmission and include a dynamic codebook for the downlink NR RFC transmission and a semi-static codebook for the downlink VLC transmission, a dynamic codebook for the downlink NR RFC transmission and a dynamic codebook for the downlink VLC transmission, a semi-static codebook for the downlink NR RFC transmission and a semi-static codebook for the downlink VLC transmission, or a semi-static codebook for the downlink NR RFC transmission and a dynamic codebook for the downlink VLC transmission.
In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, process 800 includes transmitting, for each RLC PDU, the ACK/NACK feedback in an RLC status PDU that bundles feedback for both the downlink VLC transmission and the downlink NR RFC transmission, wherein the RLC status PDU is based at least in part on data received from an RF MAC entity of the UE and a VLC MAC entity of the UE, and the downlink NR RFC transmission and the downlink VLC transmission are associated with a same RLC entity of the UE.
In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the UE is configured for an NR-VLC carrier aggregation or an NR-VLC dual connectivity.
Although
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As further shown in
As further shown in
Process 900 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.
In a first aspect, process 900 includes receiving, from the UE, a UE capability report that includes a first parameter and a second parameter, wherein the first parameter indicates that the UE supports the downlink VLC transmission and the second parameter indicates that the UE does not support the uplink VLC transmission.
In a second aspect, alone or in combination with the first aspect, process 900 includes receiving a MAC-CE that indicates the ACK/NACK feedback for the downlink VLC transmission and not for the downlink NR RFC transmission, and the MAC-CE is configured in an SPS configuration IE based at least in part on the UE being configured with an SPS downlink VLC transmission, or the MAC-CE is triggered by a MAC transmit entity at the base station based at least in part on the downlink VLC transmission being dynamically scheduled for the UE.
In a third aspect, alone or in combination with one or more of the first and second aspects, process 900 includes receiving, from the UE, a UE capability report that indicates a maximum supported quantity of HARQ processes, wherein the UE capability report indicates a maximum quantity of HARQ processes for both downlink NR RFC transmissions and downlink VLC transmissions, the UE capability report indicates a first quantity indicating a maximum quantity of HARQ processes for downlink NR RFC transmissions and a second quantity indicating a maximum quantity of HARQ processes for downlink VLC transmissions, the UE capability report indicates a first quantity indicating a maximum quantity of HARQ processes for both downlink NR RFC transmissions and downlink VLC transmissions, and a second quantity indicating a maximum quantity of HARQ processes for downlink VLC transmissions, or the UE capability report indicates a first quantity indicating a maximum quantity of HARQ processes for both downlink NR RFC transmissions and downlink VLC transmissions, and a second quantity indicating a maximum quantity of HARQ processes for downlink NR RFC transmissions.
In a fourth aspect, alone or in combination with one or more of the first through third aspects, process 900 includes receiving, for a HARQ process, the ACK/NACK feedback that bundles feedback for both the downlink VLC transmission and the downlink NR RFC transmission.
In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, process 900 includes receiving, for each RLC PDU, the ACK/NACK feedback in an RLC status PDU that bundles feedback for both the downlink VLC transmission and the downlink NR RFC transmission.
Although
In some aspects, the apparatus 1000 may be configured to perform one or more operations described herein in connection with
The reception component 1002 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 1006. The reception component 1002 may provide received communications to one or more other components of the apparatus 1000. In some aspects, the reception component 1002 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples), and may provide the processed signals to the one or more other components of the apparatus 1000. In some aspects, the reception component 1002 may include one or more antennas, a modem, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the UE described in connection with
The transmission component 1004 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1006. In some aspects, one or more other components of the apparatus 1000 may generate communications and may provide the generated communications to the transmission component 1004 for transmission to the apparatus 1006. In some aspects, the transmission component 1004 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples), and may transmit the processed signals to the apparatus 1006. In some aspects, the transmission component 1004 may include one or more antennas, a modem, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described in connection with
The reception component 1002 may receive, from a base station, a downlink VLC transmission. The reception component 1002 may receive, from the base station, a downlink NR RFC transmission, wherein a frame structure associated with the downlink VLC transmission is asynchronous with a frame structure associated with the downlink NR RFC transmission. The transmission component 1004 may transmit, to the base station via an uplink RF transmission based at least in part on a lack of support for an uplink VLC transmission at the UE, ACK/NACK feedback associated with one or more of the downlink VLC transmission or the downlink NR RFC transmission. The transmission component 1004 may transmit, to the base station, a UE capability report that includes a first parameter and a second parameter, wherein the first parameter indicates that the UE supports the downlink VLC transmission and the second parameter indicates that the UE does not support the uplink VLC transmission.
The number and arrangement of components shown in
In some aspects, the apparatus 1100 may be configured to perform one or more operations described herein in connection with
The reception component 1102 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 1106. The reception component 1102 may provide received communications to one or more other components of the apparatus 1100. In some aspects, the reception component 1102 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples), and may provide the processed signals to the one or more other components of the apparatus 1100. In some aspects, the reception component 1102 may include one or more antennas, a modem, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the base station described in connection with
The transmission component 1104 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1106. In some aspects, one or more other components of the apparatus 1100 may generate communications and may provide the generated communications to the transmission component 1104 for transmission to the apparatus 1106. In some aspects, the transmission component 1104 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples), and may transmit the processed signals to the apparatus 1106. In some aspects, the transmission component 1104 may include one or more antennas, a modem, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the base station described in connection with
The transmission component 1104 may transmit, to a UE, a downlink VLC transmission. The transmission component 1104 may transmit, to the UE, a downlink NR RFC transmission, wherein a frame structure associated with the downlink VLC transmission is asynchronous with a frame structure associated with the downlink NR RFC transmission. The reception component 1102 may receive, from the UE via an uplink RF transmission based at least in part on a lack of support for an uplink VLC transmission at the UE, ACK/NACK feedback associated with one or more of the downlink VLC transmission or the downlink NR RFC transmission. The reception component 1102 may receive, from the UE, a UE capability report that includes a first parameter and a second parameter, wherein the first parameter indicates that the UE supports the downlink VLC transmission and the second parameter indicates that the UE does not support the uplink VLC transmission.
The number and arrangement of components shown in
The following provides an overview of some Aspects of the present disclosure:
The foregoing disclosure provides illustration and description but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the aspects.
As used herein, the term “component” is intended to be broadly construed as hardware and/or a combination of hardware and software. “Software” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and/or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. As used herein, a “processor” is implemented in hardware and/or a combination of hardware and software. It will be apparent that systems and/or methods described herein may be implemented in different forms of hardware and/or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems and/or methods is not limiting of the aspects. Thus, the operation and behavior of the systems and/or methods are described herein without reference to specific software code, since those skilled in the art will understand that software and hardware can be designed to implement the systems and/or methods based, at least in part, on the description herein.
As used herein, “satisfying a threshold” may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, or the like.
Even though particular combinations of features are recited 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 may be combined in ways not specifically recited in the claims and/or disclosed in the specification. The disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set. As used herein, a phrase referring to “at least one of”' a list of items refers to any combination of those items, including single members. 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, as well as any combination with multiples of the same element (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).
No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more.” Further, as used herein, the article “the” is intended to include one or more items referenced in connection with the article “the” and may be used interchangeably with “the one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items and may be used interchangeably with “one or more.” Where only one item is intended, the phrase “only one” or similar language is used. Also, as used herein, the terms “has,” “have,” “having,” or the like are intended to be open-ended terms that do not limit an element that they modify (e.g., an element “having” A may also have B). Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise. Also, as used herein, the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and/or,” unless explicitly stated otherwise (e.g., if used in combination with “either” or “only one of”).
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2021/126291 | 10/26/2021 | WO |
