[go: up one dir, main page]

WO2022060407A1 - Ajustement de puissance d'émission d'automobile en fonction de la perte de câble entre un dispositif et une antenne de voiture pour fournir des alertes en temps réel pour une antenne corrompue et un câble corrompu - Google Patents

Ajustement de puissance d'émission d'automobile en fonction de la perte de câble entre un dispositif et une antenne de voiture pour fournir des alertes en temps réel pour une antenne corrompue et un câble corrompu Download PDF

Info

Publication number
WO2022060407A1
WO2022060407A1 PCT/US2021/019479 US2021019479W WO2022060407A1 WO 2022060407 A1 WO2022060407 A1 WO 2022060407A1 US 2021019479 W US2021019479 W US 2021019479W WO 2022060407 A1 WO2022060407 A1 WO 2022060407A1
Authority
WO
WIPO (PCT)
Prior art keywords
port
antenna
cable
power
loss
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2021/019479
Other languages
English (en)
Inventor
Haim Weissman
Alexander Sverdlov
Balasubramanian Ramachandran
Cheng Tan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Publication of WO2022060407A1 publication Critical patent/WO2022060407A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
    • H04B17/102—Power radiated at antenna
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
    • H04B17/103—Reflected power, e.g. return loss

Definitions

  • aspects of the present disclosure generally relate to wireless communications, and more particularly to techniques and apparatuses for vehicle-to- everything (V2X) adjustment of automotive transmit power as a function of cable loss between a modem device and a car, while providing real time alerts for corrupted antennas and/or corrupted cables.
  • V2X vehicle-to- everything
  • Wireless communications systems are widely deployed to provide various telecommunications services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communications systems may employ multiple-access technologies capable of supporting communications with multiple users by sharing available system resources. 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, and time division synchronous code division multiple access (TD-SCDMA) systems.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • TD-SCDMA time division synchronous code division multiple access
  • 5G NR fifth generation new radio
  • 3 GPP Third Generation Partnership Project
  • 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable low latency communications (URLLC).
  • eMBB enhanced mobile broadband
  • mMTC massive machine type communications
  • URLLC ultra-reliable low latency communications
  • 4G fourth generation
  • LTE long term evolution
  • Wireless communications systems may include or provide support for various types of communications systems, such as vehicle related communications systems (e.g., vehicle-to-everything (V2X) communications systems).
  • Vehicle related communications systems may be used by vehicles to increase safety and to help prevent collisions of vehicles.
  • Information regarding inclement weather, nearby accidents, road conditions, and/or other information may be conveyed to a driver via the vehicle related communications system.
  • sidelink user equipments UEs
  • vehicles may communicate directly with each other using device-to-device (D2D) communications over a D2D wireless link. These communications can be referred to as sidelink communications.
  • D2D device-to-device
  • a method of wireless communication by a user equipment (UE), includes computing a transmit power at a first port in response to a received forward detected power measured at a third port.
  • the method also includes computing a return loss of an antenna at a second port in response to a received reflection value measured at a fourth port.
  • the method further includes estimating a cable loss based on a difference between a device output power and the computed transmit power at the first port.
  • the method also includes adjusting a transmit power at the second port according to the estimated cable loss and/or the computed return loss.
  • An integrated circuit includes a hybrid cross-coupler.
  • the hybrid crosscoupler includes a first port coupled to a cable output at a coupler input, a second port coupled to the first port and to an antenna port at a coupler output, a third port crosscoupled to the first port, and a fourth port cross-coupled to the second port and coupled to the third port.
  • the integrated circuit also includes a power detector.
  • the power detector is coupled to the third port and to the fourth port of the hybrid cross-coupler.
  • the power detector is composed of a transceiver configured to report, to an connected vehicle, a forward detected power measured at the third port and a received antenna reflection power value measured at the fourth port.
  • An apparatus for wireless communication by a user equipment (UE), includes means for computing a transmit power at a first port in response to a received forward detected power measured at a third port.
  • the apparatus also includes means for computing a return loss of an antenna at a second port in response to a received reflection value measured at a fourth port.
  • the apparatus further includes means for estimating a cable loss based on a difference between a device output power and the computed transmit power at the first port.
  • the apparatus also includes means for adjusting a transmit power at the second port according to the estimated cable loss and/or the computed return loss.
  • a user equipment includes a processor and a memory coupled with the processor.
  • the UE also includes instructions stored in the memory.
  • the UE is operable to compute a transmit power at a first port in response to a received forward detected power measured at a third port.
  • the UE is also operable to compute a return loss of an antenna at a second port in response to a received antenna reflection power value measured at a fourth port.
  • the UE is further operable to estimate a cable loss based on a difference between a device output power and the computed transmit power at the first port.
  • the UE is also operable to adjust a transmit power at the second port according to the estimated cable loss and/or the computed return loss.
  • aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communications device, and processing system as substantially described with reference to and as illustrated by the accompanying drawings and specification.
  • FIGURE l is a diagram illustrating an example of a wireless communications system and an access network.
  • FIGURES 2A, 2B, 2C, and 2D are diagrams illustrating examples of a first fifth generation (5G) new radio (NR) frame, downlink (DL) channels within a 5G NR subframe, a second 5G NR frame, and uplink (UL) channels within a 5G NR subframe, respectively.
  • 5G fifth generation
  • NR new radio
  • FIGURE 3 is a diagram illustrating an example of a base station and user equipment (UE) in an access network.
  • FIGURE 4 is a diagram illustrating an example of a vehicle-to-everything (V2X) system, in accordance with various aspects of the present disclosure.
  • V2X vehicle-to-everything
  • FIGURE 5 is a block diagram illustrating an example of a vehicle-to- everything (V2X) system with a road side unit (RSU), according to aspects of the present disclosure.
  • V2X vehicle-to- everything
  • RSU road side unit
  • FIGURE 6 illustrates a sidelink (SL) communications scheme, in accordance with various aspects of the present disclosure.
  • FIGURE 7 is a block diagram illustrating a connected vehicle having a radio unit configured as a cellular vehicle-to-everything (CV2X) communications unit of a connected car application reference design (CCARD) automotive development platform, according to aspects of the present disclosure.
  • CV2X vehicle-to-everything
  • CCARD connected car application reference design
  • FIGURE 8 is a block diagram illustrating a communications system of a connected vehicle configured to compensate for damaged antennas and/or cable links of a connected vehicle, according to aspects of the present disclosure.
  • FIGURE 9 is a flow diagram illustrating an example process performed, for example, by a user equipment, to provide enhancements by compensating for a corrupted cable and/or a corrupted vehicle antenna of a connected vehicle, in accordance with various aspects of the present disclosure.
  • wireless devices may generally communicate with each other via one or more network entities such as a base station or scheduling entity.
  • Some networks may support device-to-device (D2D) communications that enable discovery of, and communications with nearby devices using a direct link between devices (e.g., without passing through a base station, relay, or another node).
  • D2D communications can enable mesh networks and device-to- network relay functionality.
  • Some examples of D2D technology include Bluetooth pairing, Wi-Fi Direct, Miracast, and LTE-D.
  • D2D communications may also be referred to as point-to-point (P2P) or sidelink communications.
  • P2P point-to-point
  • D2D communications may be implemented using licensed or unlicensed bands. Additionally, D2D communications can avoid the overhead involving the routing to and from the base station. Therefore, D2D communications can improve throughput, reduce latency, and/or increase energy efficiency.
  • a type of D2D communications may include vehicle-to-everything (V2X) communications.
  • V2X communications may assist autonomous vehicles in communicating with each other.
  • autonomous vehicles may include multiple sensors (e.g., light detection and ranging (LiDAR), radar, cameras, etc.). In most cases, the autonomous vehicle’s sensors are line of sight sensors. In contrast, V2X communications may allow autonomous vehicles to communicate with each other for non-line of sight situations.
  • V2X communications may allow autonomous vehicles to communicate with each other for non-line of sight situations.
  • Sidelink (SL) communications refers to the communications among user equipment (UEs) without tunneling through a base station (BS) and/or a core network.
  • Sidelink communications can be communicated over a physical sidelink control channel (PSCCH) and a physical sidelink shared channel (PSSCH).
  • PSCCH and PSSCH are similar to a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) in downlink (DL) communications between a BS and a UE.
  • the PSCCH may carry sidelink control information (SCI) and the PSSCH may carry sidelink data (e.g., user data).
  • SCI sidelink control information
  • PSSCH may carry sidelink data (e.g., user data).
  • Each PSCCH is associated with a corresponding PSSCH, where SCI in a PSCCH may carry reservation and/or scheduling information for sidelink data transmission in the associated PSSCH.
  • Use cases for sidelink communications may include, among others, vehicle-to-everything (V2X), industrial loT (IIoT), and/or NR-lite.
  • V2X vehicle-to-everything
  • IIoT industrial loT
  • NR-lite NR-lite
  • CV2X communication e.g., CV2X mode-4
  • SPS semi-persistent scheduling
  • sidelink control information is transmitted over a physical sidelink control channel (PSCCH) and the data is transmitted over a physical sidelink shared channel (PSSCH).
  • PSCCH physical sidelink control channel
  • PSSCH physical sidelink shared channel
  • a CV2X signal randomly varies from one subframe (SF) to another with different frequency allocations and received signal power for each subframe, which is less stable over time.
  • a CV2X transceiver transmits at a very low duty cycle (e.g., ⁇ 2%).
  • a CV2X transceiver may transmit once per one hundred milliseconds (100 msec), once per two hundred milliseconds (200 msec), or once per three hundred milliseconds (300 msec).
  • a CV2X receiver performs channel busy ratio (CBR) measurements to estimate a portion of sub-channels having a sidelink (SL) received signal strength indicator (S-RSSI) value exceeding a pre-defined threshold (e.g., over subframes).
  • CBR channel busy ratio
  • S-RSSI sidelink received signal strength indicator
  • a portion of the subchannels are selected and used for transmission. Selecting the portion of sub-channels for transmission relies on accurate sidelink received signal strength indicator (RSSI) values. That is, the accuracy of the sidelink received signal strength indicator values is important for proper operation in a CV2X system.
  • the accuracy of the sidelink received signal strength indicator values during operation of the CV2X system may be degraded due to damaged cables and/or antennas of a connected vehicle.
  • a connected vehicle refers to a vehicle equipped with a CV2X system, such as a connected car application reference design (CCARD) automotive development platform.
  • CCARD connected car application reference design
  • a transmit power of a connected vehicle transceiver is boosted by adjusting a transmit power in response to detection of an estimated cable loss.
  • a cyclic-delay diversity (CDD) supports boosting of a transmit power by a predetermined boost amount (e.g., up to 3 dB) when a cable loss is greater than or equal to a predetermined loss amount (e.g., > 3 dB).
  • WWAN wireless wide area network
  • MIMO multiple- input-multiple-output
  • cable loss estimation is used to refine estimation of a receive signal strength indicator (RSSI) as well as a reference signal received power (RSRP) as a function of the cable loss.
  • RSSI receive signal strength indicator
  • RSRP reference signal received power
  • aspects of the present disclosure are also applicable to corrupted or broken antenna detection as well as corrupted cable detection.
  • an integrated circuit (IC) device including a hybrid coupler is configured for attachment to an antenna connector of a connected vehicle.
  • the IC device may be thin (e.g., a few millimeters) and have a small form factor.
  • the hybrid coupler of the IC device detects reflections from the antenna to determine if an antenna corruption is detected when a return loss is over a pre-defined voltage threshold using a detector at a fourth port of the hybrid coupler.
  • forward coupled power allows detecting of the transmitted power into the antenna. In case of a corrupted cable, a significant drop (e.g., much more than 4 dB) is expected. The forward coupled power is measured at a third port of the hybrid coupler. Once the forward coupled power is accurately detected, the IC device sends the forward coupled power to the connected vehicle (e.g., a connected car application reference design (CCARD) automotive development platform).
  • the connected vehicle e.g., a connected car application reference design (CCARD) automotive development platform.
  • the forward coupled power is sent to the connected vehicle using a low frequency modulated transceiver (e.g., 100 kHz or any other frequency up to very high frequency (VHF)) over the cable (or a wireless device such as Bluetooth).
  • a device modem of the connected vehicle performs a cable loss estimation based on the detected transmit power on the antenna side, which is referred to as the transmit power at the antenna connector.
  • Estimation of the cable loss by the device modem e.g. CCARD device
  • refinement of the receive signal strength indicator (RSSI) as well as reference signal received power (RSRP) measurements result in improved channel busy ratio (CBR) measurements and the related transmissions.
  • the cable loss estimation is also used to boost each transmit chain power at the antenna device connector. For example, for a cyclic-delay diversity (CDD), an output power is boosted from a first level (e.g., +17 dBm) to a boosted level (e.g., +23 dBm), for a cable loss greater than or equal to a predetermined loss value (e.g., > 3 dB).
  • a predetermined loss value e.g., > 3 dB
  • FCC Federal Communications Commission
  • Estimation of the cable loss allows identifying a corrupted cable and reporting the corrupted cable to the connected vehicle in a timely manner for urgent repair.
  • detection of a corrupted antenna also allows identifying the corrupted antenna and reporting the corrupted antenna to the connected vehicle in a timely manner for urgent repair.
  • Aspects of the present disclosure provide a significant performance improvement and real time identification of failures related to a corrupted cable and/or a corrupted antenna of a connected vehicle.
  • FIGURE l is a diagram illustrating an example of a wireless communications system and an access network 100.
  • the wireless communications system (also referred to as a wireless wide area network (WWAN)) includes base stations 102, UEs 104, an evolved packet core (EPC) 160, and another core network 190 (e.g., a 5G core (5GC)).
  • the base stations 102 may include macrocells (high power cellular base station) and/or small cells 102’ (low power cellular base station).
  • the macrocells include base stations.
  • the small cells 102’ include femtocells, picocells, and microcells.
  • the base stations 102 configured for 4G LTE may interface with the EPC 160 through backhaul links 132 (e.g., SI interface).
  • the base stations 102 configured for 5G NR may interface with core network 190 through backhaul links 184.
  • UMTS evolved universal mobile telecommunications system
  • 5G NR next generation RAN
  • the base stations 102 may perform one or more of the following functions: transfer of user data, radio channel ciphering and deciphering, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection setup and release, load balancing, distribution for non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment trace, RAN information management (RIM), paging, positioning, and delivery of warning messages.
  • the base stations 102 may communicate directly or indirectly (e.g., through the EPC 160 or core network 190) with each other over backhaul links 134 (e.g., X2 interface).
  • the backhaul links 134 may be wired or wireless.
  • the base stations 102 may wirelessly communicate with the UEs 104. Each of the base stations 102 may provide communications coverage for a respective geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, the small cell 102' may have a coverage area 110' that overlaps the coverage area 110 of one or more macro base stations 102.
  • a network that includes both small cell and macrocells may be known as a heterogeneous network.
  • a heterogeneous network may also include home evolved Node Bs (eNBs) (HeNBs), which may provide service to a restricted group known as a closed subscriber group (CSG).
  • eNBs home evolved Node Bs
  • CSG closed subscriber group
  • the communications links 120 between the base stations 102 and the UEs 104 may include uplink (UL) (also referred to as reverse link) transmissions from a UE 104 to a base station 102 and/or downlink (DL) (also referred to as forward link) transmissions from a base station 102 to a UE 104.
  • UL uplink
  • DL downlink
  • the communications links 120 may use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and/or transmit diversity.
  • MIMO multiple-input and multiple-output
  • the communications links may be through one or more carriers.
  • the base stations 102 / UEs 104 may use spectrum up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc., MHz) bandwidth per carrier allocated in a carrier aggregation of up to a total of Yx MHz (x component carriers) used for transmission in each direction.
  • the carriers may or may not be adjacent to each other. Allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL than for UL).
  • the component carriers may include a primary component carrier and one or more secondary component carriers.
  • a primary component carrier may be referred to as a primary cell (PCell) and a secondary component carrier may be referred to as a secondary cell (SCell).
  • PCell primary cell
  • SCell secondary cell
  • D2D communications link 158 may use the DL/UL WWAN spectrum.
  • the D2D communications link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH).
  • sidelink channels such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH).
  • sidelink channels such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH).
  • sidelink channels such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH).
  • the wireless communications system may further include a Wi-Fi access point (AP) 150 in communication with Wi-Fi stations (STAs) 152 via communications links 154 in a 5 GHz unlicensed frequency spectrum.
  • AP Wi-Fi access point
  • STAs Wi-Fi stations
  • communications links 154 in a 5 GHz unlicensed frequency spectrum.
  • the STAs 152 / AP 150 may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available.
  • CCA clear channel assessment
  • the small cell 102' may operate in a licensed and/or an unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cell 102' may employ NR and use the same 5 GHz unlicensed frequency spectrum as used by the Wi-Fi AP 150.
  • the small cell 102', employing NR in an unlicensed frequency spectrum may boost coverage to and/or increase capacity of the access network.
  • a base station 102 may include an eNB, gNodeB (e.g., gNB), or another type of base station.
  • Some base stations, such as gNB 180 may operate in a traditional sub 6 GHz spectrum, in millimeter wave (mmWave) frequencies, and/or near mmWave frequencies in communication with the UE 104.
  • mmWave millimeter wave
  • mmWave millimeter wave
  • near mmWave frequencies in communication with the UE 104.
  • the gNB 180 When the gNB 180 operates in mmWave or near mmWave frequencies, the gNB 180 may be referred to as an mmWave base station.
  • Extremely high frequency (EHF) is part of the radio frequency (RF) in the electromagnetic spectrum.
  • EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 millimeter and 10 millimeters. Radio waves in the band may be referred to as a millimeter wave. Near mmWave may extend down to a frequency of 3 GHz with a wavelength of 100 millimeters.
  • the super high frequency (SHF) band extends between 3 GHz and 30 GHz, also referred to as centimeter wave. Communications using the mmWave / near mmWave radio frequency band (e.g., 3 GHz - 300 GHz) has extremely high path loss and a short range.
  • the mmWave base station 180 may utilize beamforming 182 with the UE 104 to compensate for the extremely high path loss and short range.
  • the base station 180 may transmit a beamformed signal to the UE 104 in one or more transmit directions 182'.
  • the UE 104 may receive the beamformed signal from the base station 180 in one or more receive directions 182".
  • the UE 104 may also transmit a beamformed signal to the base station 180 in one or more transmit directions.
  • the base station 180 may receive the beamformed signal from the UE 104 in one or more receive directions.
  • the base station 180 / UE 104 may perform beam training to determine the best receive and transmit directions for each of the base station 180 / UE 104.
  • the transmit and receive directions for the base station 180 may or may not be the same.
  • the transmit and receive directions for the UE 104 may or may not be the same.
  • the EPC 160 may include a mobility management entity (MME) 162, other MMEs 164, a serving gateway 166, a multimedia broadcast multicast service (MBMS) gateway 168, a broadcast multicast service center (BM-SC) 170, and a packet data network (PDN) gateway 172.
  • MME mobility management entity
  • MBMS multimedia broadcast multicast service
  • BM-SC broadcast multicast service center
  • PDN packet data network gateway 172
  • the MME 162 may be in communication with a home subscriber server (HSS) 174.
  • HSS home subscriber server
  • the MME 162 is the control node that processes the signaling between the UEs 104 and the EPC 160.
  • the MME 162 provides bearer and connection management. All user Internet protocol (IP) packets are transferred through the serving gateway 166, which itself is connected to the PDN gateway 172.
  • IP Internet protocol
  • the PDN gateway 172 provides UE IP address allocation as well as other functions.
  • the PDN gateway 172 and the BM-SC 170 are connected to the IP services 176.
  • the IP services 176 may include the Internet, an intranet, an IP multimedia subsystem (IMS), a PS streaming service, and/or other IP services.
  • the BM-SC 170 may provide functions for MBMS user service provisioning and delivery.
  • the BM-SC 170 may serve as an entry point for content provider MBMS transmission, may be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and may be used to schedule MBMS transmissions.
  • PLMN public land mobile network
  • the MBMS gateway 168 may be used to distribute MBMS traffic to the base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area broadcasting a particular service, and may be responsible for session management (start/stop) and for collecting evolved MBMS (eMBMS) related charging information.
  • MMSFN multicast broadcast single frequency network
  • eMBMS evolved MBMS
  • the core network 190 may include an access and mobility management function (AMF) 192, other AMFs 193, a session management function (SMF) 194, and a user plane function (UPF) 195.
  • the AMF 192 may be in communication with a unified data management (UDM) 196.
  • the AMF 192 is the control node that processes the signaling between the UEs 104 and the core network 190.
  • the AMF 192 provides quality of service (QoS) flow and session management. All user Internet protocol (IP) packets are transferred through the UPF 195.
  • the UPF 195 provides UE IP address allocation as well as other functions.
  • the UPF 195 is connected to the IP services 197.
  • the IP services 197 may include the Internet, an intranet, an IP multimedia subsystem (IMS), a PS streaming service, and/or other IP services.
  • IMS IP multimedia subsystem
  • PS streaming service and/or other IP services.
  • the base station 102 may also be referred to as a gNB, Node B, evolved Node B (eNB), an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmit and reception point (TRP), or some other suitable terminology.
  • the base station 102 provides an access point to the EPC 160 or core network 190 for a UE 104.
  • Examples of UEs 104 include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor/actuator, a display, or any other similar functioning device.
  • SIP session initiation protocol
  • PDA personal digital assistant
  • Some of the UEs 104 may be referred to as loT devices (e.g., a parking meter, gas pump, toaster, vehicles, heart monitor, etc.).
  • the UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.
  • a receiving device such as the UE 104, may compute a transmit power at a first port in response to a received forward detected power measured at a third port.
  • the UE 104 may also compute a transmit power at a first port in response to a received forward detected power measured at a third port.
  • the UE 104 may include a transmit power adjustment component 198 configured to estimate a cable loss based on a difference between a device output power and the computed transmit power at the first port, and to adjust a transmit power at the second port according to the estimated cable loss and/or the computed return loss.
  • the transmit power adjustment component 198 may be configured to report detection of a corrupted cable and/or a corrupted antenna of a connected vehicle.
  • 5G NR Although the following description may be focused on 5G NR, it may be applicable to other similar areas, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.
  • FIGURE 2A is a diagram 200 illustrating an example of a first subframe within a 5G NR frame structure.
  • FIGURE 2B is a diagram 230 illustrating an example of DL channels within a 5GNR subframe.
  • FIGURE 2C is a diagram 250 illustrating an example of a second subframe within a 5G NR frame structure.
  • FIGURE 2D is a diagram 280 illustrating an example of UL channels within a 5G NR subframe.
  • the 5G NR frame structure may be frequency division duplex (FDD) in which for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated for either DL or UL, or may be time division duplex (TDD) in which for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated for both DL and UL.
  • FDD frequency division duplex
  • TDD time division duplex
  • the 5G NR frame structure is assumed to be TDD, with subframe 4 being configured with slot format 28 (with mostly DL), where D is DL, U is UL, and X is flexible for use between DL/UL, and subframe 3 being configured with slot format 34 (with mostly UL).
  • subframes 3, 4 are shown with slot formats 34, 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61.
  • Slot formats 0, 1 are all DL, UL, respectively.
  • Other slot formats 2-61 include a mix of DL, UL, and flexible symbols.
  • UEs are configured with the slot format (dynamically through DL control information (DCI), or semi- statically/statically through radio resource control (RRC) signaling) through a received slot format indicator (SFI). Note that the description infra applies also to a 5G NR frame structure that is TDD.
  • DCI DL control information
  • RRC radio resource control
  • a frame (10 ms) may be divided into 10 equally sized subframes (1 ms). Each subframe may include one or more time slots. Subframes may also include mini-slots, which may include 7, 4, or 2 symbols. Each slot may include 7 or 14 symbols, depending on the slot configuration. For slot configuration 0, each slot may include 14 symbols, and for slot configuration 1, each slot may include 7 symbols.
  • the symbols on DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols.
  • the symbols on UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-S-OFDM) symbols (also referred to as single carrier frequency-division multiple access (SC-FDMA) symbols) (for power limited scenarios; limited to a single stream transmission).
  • the number of slots within a subframe is based on the slot configuration and the numerology. For slot configuration 0, different numerologies p 0 to 5 allow for 1, 2, 4, 8, 16, and 32 slots, respectively, per subframe. For slot configuration 1, different numerologies 0 to 2 allow for 2, 4, and 8 slots, respectively, per subframe. Accordingly, for slot configuration 0 and numerology p, there are 14 symbols/slot and 2p slots/subframe.
  • the subcarrier spacing and symbol length/duration are a function of the numerology.
  • the subcarrier spacing may be equal to 2 A p*15 kHz, where p is the numerology 0 to 5.
  • the symbol length/duration is inversely related to the subcarrier spacing.
  • the subcarrier spacing is 15 kHz and symbol duration is approximately 66.7 ps.
  • a resource grid may represent the frame structure.
  • Each time slot includes a resource block (RB) (also referred to as physical RBs (PRBs)) that extends 12 consecutive subcarriers.
  • RB resource block
  • PRBs physical RBs
  • the resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.
  • the RS may include demodulation RS (DM-RS) (indicated as Rx for one particular configuration, where lOOx is the port number, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RS) for channel estimation at the UE.
  • DM-RS demodulation RS
  • CSI-RS channel state information reference signals
  • the RS may also include beam measurement RS (BRS), beam refinement RS (BRRS), and phase tracking RS (PT-RS).
  • BRS beam measurement RS
  • BRRS beam refinement RS
  • PT-RS phase tracking RS
  • FIGURE 2B illustrates an example of various DL channels within a subframe of a frame.
  • the physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs), each CCE including nine RE groups (REGs), each REG including four consecutive REs in an OFDM symbol.
  • a primary synchronization signal (PSS) may be within symbol 2 of particular subframes of a frame. The PSS is used by a UE 104 to determine subframe/symbol timing and a physical layer identity.
  • a secondary synchronization signal (SSS) may be within symbol 4 of particular subframes of a frame. The SSS is used by a UE to determine a physical layer cell identity group number and radio frame timing.
  • the UE can determine a physical cell identifier (PCI). Based on the PCI, the UE can determine the locations of the aforementioned DM-RS.
  • the physical broadcast channel (PBCH) which carries a master information block (MIB), may be logically grouped with the PSS and SSS to form a synchronization signal (SS)/PBCH block.
  • the MIB provides a number of RBs in the system bandwidth and a system frame number (SFN).
  • the physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH such as system information blocks (SIBs), and paging messages.
  • SIBs system information blocks
  • some of the REs carry DM-RS (indicated as R for one particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station.
  • the UE may transmit DM-RS for the physical uplink control channel (PUCCH) and DM-RS for the physical uplink shared channel (PUSCH).
  • the PUSCH DM-RS may be transmitted in the first one or two symbols of the PUSCH.
  • the PUCCH DM-RS may be transmitted in different configurations depending on whether short or long PUCCHs are transmitted and depending on the particular PUCCH format used.
  • the UE may transmit sounding reference signals (SRS).
  • the SRS may be used by a base station for channel quality estimation to enable frequency-dependent scheduling on the UL.
  • FIGURE 2D illustrates an example of various UL channels within a subframe of a frame.
  • the PUCCH may be located as indicated in one configuration.
  • the PUCCH carries uplink control information (UCI), such as scheduling requests, a channel quality indicator (CQI), a precoding matrix indicator (PMI), a rank indicator (RI), and hybrid automatic repeat request (HARQ) acknowledgment/negative acknowledgment (ACK/NACK) feedback.
  • UCI uplink control information
  • the PUSCH carries data, and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and/or UCI.
  • BSR buffer status report
  • PHR power headroom report
  • FIGURE 3 is a block diagram of a base station 310 in communication with a UE 350 in an access network.
  • IP packets from the EPC 160 may be provided to a controller/processor 375.
  • the controller/processor 375 implements layer 3 and layer 2 functionality.
  • Layer 3 includes a radio resource control (RRC) layer
  • layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer.
  • RRC radio resource control
  • SDAP service data adaptation protocol
  • PDCP packet data convergence protocol
  • RLC radio link control
  • MAC medium access control
  • the controller/processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIBs), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression / decompression, security (ciphering, deciphering, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with the transfer of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction
  • the transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions.
  • Layer 1 which includes a physical (PHY) layer, may include error detection on the transport channels, forward error correction (FEC) coding/decoding of the transport channels, interleaving, rate matching, mapping onto physical channels, modulation/demodulation of physical channels, and MIMO antenna processing.
  • the TX processor 316 handles mapping to signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), M-phase-shift keying (M-PSK), M-quadrature amplitude modulation (M- QAM)).
  • BPSK binary phase-shift keying
  • QPSK quadrature phase-shift keying
  • M-PSK M-phase-shift keying
  • M- QAM M-quadrature amplitude modulation
  • the coded and modulated symbols may then be split into parallel streams.
  • Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and/or frequency domain, and then combined together using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream.
  • the OFDM stream is spatially precoded to produce multiple spatial streams.
  • Channel estimates from a channel estimator 374 may be used to determine the coding and modulation scheme, as well as for spatial processing.
  • the channel estimate may be derived from a reference signal and/or channel condition feedback transmitted by the UE 350.
  • Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318TX.
  • Each transmitter 318TX may modulate a radio frequency (RF) carrier with a respective spatial stream for transmission.
  • RF radio frequency
  • each receiver 354RX receives a signal through its respective antenna 352.
  • Each receiver 354RX recovers information modulated onto an RF carrier and provides the information to the receive (RX) processor 356.
  • the TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions.
  • the RX processor 356 may perform spatial processing on the information to recover any spatial streams destined for the UE 350. If multiple spatial streams are destined for the UE 350, they may be combined by the RX processor 356 into a single OFDM symbol stream.
  • the RX processor 356 then converts the OFDM symbol stream from the time-domain to the frequency domain using a fast Fourier transform (FFT).
  • FFT fast Fourier transform
  • the frequency domain signal comprises a separate OFDM symbol stream for each subcarrier of the OFDM signal.
  • the symbols on each subcarrier, and the reference signal are recovered and demodulated by determining the most likely signal constellation points transmitted by the base station 310. These soft decisions may be based on channel estimates computed by the channel estimator 358.
  • the soft decisions are then decoded and deinterleaved to recover the data and control signals that were originally transmitted by the base station 310 on the physical channel.
  • the data and control signals are then provided to the controller/processor 359, which implements layer 3 and layer 2 functionality.
  • the controller/processor 359 can be associated with a memory 360 that stores program codes and data.
  • the memory 360 may be referred to as a computer- readable medium.
  • the controller/processor 359 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, and control signal processing to recover IP packets from the EPC 160.
  • the controller/processor 359 is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations.
  • the controller/processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting; PDCP layer functionality associated with header compression / decompression, and security (ciphering, deciphering, integrity protection, integrity verification); RLC layer functionality associated with the transfer of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.
  • RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting
  • PDCP layer functionality associated with header compression
  • Channel estimates derived by a channel estimator 358 from a reference signal or feedback transmitted by the base station 310 may be used by the TX processor 368 to select the appropriate coding and modulation schemes, and to facilitate spatial processing.
  • the spatial streams generated by the TX processor 368 may be provided to different antenna 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a respective spatial stream for transmission.
  • the UL transmission is processed at the base station 310 in a manner similar to that described in connection with the receiver function at the UE 350.
  • Each receiver 318RX receives a signal through its respective antenna 320.
  • Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to a RX processor 370.
  • the controller/processor 375 can be associated with a memory 376 that stores program codes and data.
  • the memory 376 may be referred to as a computer- readable medium.
  • the controller/processor 375 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover IP packets from the UE 350. IP packets from the controller/processor 375 may be provided to the EPC 160.
  • the controller/processor 375 is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations.
  • At least one of the TX processor 368, the RX processor 356, and the controller/processor 359 may be configured to perform aspects in connection with the transmit power adjustment component 198 of FIGURE 1.
  • the UE 104, 350 may include means for adjusting, means for computing, means for estimating, means for identifying, means for refining, means for triggering, means for wirelessly reporting, means for boosting, and/or means for adjusting.
  • Such means may include one or more components of the UE 104, 350 described in connection with FIGURES 1 and 3.
  • FIGURE 4 is a diagram of a device-to-device (D2D) communications system 400, including V2X communications, in accordance with various aspects of the present disclosure.
  • D2D device-to-device
  • the D2D communications system 400 may include V2X communications, (e.g., a first UE 450 communicating with a second UE 451).
  • the first UE 450 and/or the second UE 451 may be configured to communicate in a licensed radio frequency spectrum and/or a shared radio frequency spectrum.
  • the shared radio frequency spectrum may be unlicensed, and therefore multiple different technologies may use the shared radio frequency spectrum for communications, including new radio (NR), LTE, LTE-Advanced, licensed assisted access (LAA), dedicated short range communications (DSRC), MuLTEFire, 4G, and the like.
  • NR new radio
  • LAA licensed assisted access
  • DSRC dedicated short range communications
  • MuLTEFire 4G, and the like.
  • the D2D communications system 400 may use NR radio access technology.
  • other radio access technologies such as LTE radio access technology, may be used.
  • the UEs 450, 451 may be on networks of different mobile network operators (MNOs).
  • MNOs mobile network operators
  • Each of the networks may operate in its own radio frequency spectrum.
  • the air interface to a first UE 450 e.g., Uu interface
  • the first UE 450 and the second UE 451 may communicate via a sidelink component carrier, for example, via the PC5 interface.
  • the MNOs may schedule sidelink communications between or among the UEs 450, 451 in licensed radio frequency spectrum and/or a shared radio frequency spectrum (e.g., 5 GHz radio spectrum bands).
  • the shared radio frequency spectrum may be unlicensed, and therefore different technologies may use the shared radio frequency spectrum for communications.
  • a D2D communications e.g., sidelink communications
  • the D2D communications system 400 may further include a third UE 452.
  • the third UE 452 may operate on the first network 410 (e.g., of the first MNO) or another network, for example.
  • the third UE 452 may be in D2D communications with the first UE 450 and/or second UE 451.
  • the first base station 420 e.g., gNB
  • the first base station 420 may communicate with the third UE 452 via a downlink (DL) carrier 432 and/or an uplink (UL) carrier 442.
  • the DL communications may be use various DL resources (e.g., the DL subframes (FIGURE 2A) and/or the DL channels (FIGURE 2B)).
  • the UL communications may be performed via the UL carrier 442 using various UL resources (e.g., the UL subframes (FIGURE 2C) and the UL channels (FIGURE 2D)).
  • the first network 410 operates in a first frequency spectrum and includes the first base station 420 (e.g., gNB) communicating at least with the first UE 450, for example, as described in FIGURES 1-3.
  • the first base station 420 e.g., gNB
  • the first base station 420 may communicate with the first UE 450 via a DL carrier 430 and/or an UL carrier 440.
  • the DL communications may be use various DL resources (e.g., the DL subframes (FIGURE 2A) and/or the DL channels (FIGURE 2B)).
  • the UL communications may be performed via the UL carrier 440 using various UL resources (e.g., the UL subframes (FIGURE 2C) and the UL channels (FIGURE 2D)).
  • the second UE 451 may be on a different network from the first UE 450.
  • the second UE 451 may be on a second network 411 (e.g., of the second MNO).
  • the second network 411 may operate in a second frequency spectrum (e.g., a second frequency spectrum different from the first frequency spectrum) and may include the second base station 421 (e.g., gNB) communicating with the second UE 451, for example, as described in FIGURES 1-3.
  • the second base station 421 may communicate with the second UE 451 via a DL carrier 431 and an UL carrier 441.
  • the DL communications are performed via the DL carrier 431 using various DL resources (e.g., the DL subframes (FIGURE 2A) and/or the DL channels (FIGURE 2B)).
  • the UL communications are performed via the UL carrier 441 using various UL resources (e.g., the UL subframes (FIGURE 2C) and/or the UL channels (FIGURE 2D)).
  • the first base station 420 and/or the second base station 421 assign resources to the UEs for device-to-device (D2D) communications (e.g., V2X communications and/or V2V communications).
  • D2D device-to-device
  • the resources may be a pool of UL resources, both orthogonal (e.g., one or more frequency division multiplexing (FDM) channels) and non-orthogonal (e.g., code division multiplexing (CDM)/resource spread multiple access (RSMA) in each channel).
  • FDM frequency division multiplexing
  • CDM code division multiplexing
  • RSMA resource spread multiple access
  • the first base station 420 and/or the second base station 421 may configure the resources via the PDCCH (e.g., faster approach) or RRC (e.g., slower approach).
  • each UE 450, 451 autonomously selects resources for D2D communications. For example, each UE 450, 451 may sense and analyze channel occupation during the sensing window. The UEs 450, 451 may use the sensing information to select resources from the sensing window. As discussed, one UE 451 may assist another UE 450 in performing resource selection. The UE 451 providing assistance may be referred to as the receiver UE or partner UE, which may potentially notify the transmitter UE 450. The transmitter UE 450 may transmit information to the receiving UE 451 via sidelink communications.
  • the D2D communications may be carried out via one or more sidelink carriers 470, 480.
  • the one or more sidelink carriers 470, 480 may include one or more channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH), for example.
  • PSBCH physical sidelink broadcast channel
  • PSDCH physical sidelink discovery channel
  • PSSCH physical sidelink shared channel
  • PSCCH physical sidelink control channel
  • the sidelink carriers 470, 480 may operate using the PC5 interface.
  • the first UE 450 may transmit to one or more (e.g., multiple) devices, including to the second UE 451 via the first sidelink carrier 470.
  • the second UE 451 may transmit to one or more (e.g., multiple) devices, including to the first UE 450 via the second sidelink carrier 480.
  • the UL carrier 440 and the first sidelink carrier 470 may be aggregated to increase bandwidth.
  • the first sidelink carrier 470 and/or the second sidelink carrier 480 may share the first frequency spectrum (with the first network 410) and/or share the second frequency spectrum (with the second network 411).
  • the sidelink carriers 470, 480 may operate in an unlicensed/ shared radio frequency spectrum.
  • sidelink communications on a sidelink carrier may occur between the first UE 450 and the second UE 451.
  • the first UE 450 may perform sidelink communications with one or more (e.g., multiple) devices, including the second UE 451 via the first sidelink carrier 470.
  • the first UE 450 may transmit a broadcast transmission via the first sidelink carrier 470 to the multiple devices (e.g., the second and third UEs 451, 452).
  • the second UE 451 (e.g., among other UEs) may receive such broadcast transmission.
  • the first UE 450 may transmit a multicast transmission via the first sidelink carrier 470 to the multiple devices (e.g., the second and third UEs 451, 452).
  • the second UE 451 and/or the third UE 452 (e.g., among other UEs) may receive such multicast transmission.
  • the multicast transmissions may be connectionless or connection- oriented.
  • a multicast transmission may also be referred to as a groupcast transmission.
  • the first UE 450 may transmit a unicast transmission via the first sidelink carrier 470 to a device, such as the second UE 451.
  • the second UE 451 may transmit a unicast transmission via the first sidelink carrier 470 to a device, such as the second UE 451.
  • the UE 451 may receive such unicast transmission. Additionally or alternatively, the second UE 451 may perform sidelink communications with one or more (e.g., multiple) devices, including the first UE 450 via the second sidelink carrier 480. For example, the second UE 451 may transmit a broadcast transmission via the second sidelink carrier 480 to the multiple devices. The first UE 450 (e.g., among other UEs) may receive such broadcast transmission.
  • the second UE 451 may perform sidelink communications with one or more (e.g., multiple) devices, including the first UE 450 via the second sidelink carrier 480. For example, the second UE 451 may transmit a broadcast transmission via the second sidelink carrier 480 to the multiple devices. The first UE 450 (e.g., among other UEs) may receive such broadcast transmission.
  • the second UE 451 may transmit a multicast transmission via the second sidelink carrier 480 to the multiple devices (e.g., the first and third UEs 450, 452).
  • the first UE 450 and/or the third UE 452 (e.g., among other UEs) may receive such multicast transmission.
  • the second UE 451 may transmit a unicast transmission via the second sidelink carrier 480 to a device, such as the first UE 450.
  • the first UE 450 (e.g., among other UEs) may receive such unicast transmission.
  • the third UE 452 may communicate in a similar manner.
  • such sidelink communications on a sidelink carrier between the first UE 450 and the second UE 451 may occur without having MNOs allocating resources (e.g., one or more portions of a resource block (RB), slot, frequency band, and/or channel associated with a sidelink carrier 470, 480) for such communications and/or without scheduling such communications.
  • Sidelink communications may include traffic communications (e.g., data communications, control communications, paging communications and/or system information communications).
  • sidelink communications may include sidelink feedback communications associated with traffic communications (e.g., a transmission of feedback information for previously-received traffic communications).
  • Sidelink communications may employ at least one sidelink communications structure having at least one feedback symbol.
  • the feedback symbol of the sidelink communications structure may allot for any sidelink feedback information that may be communicated in the device-to-device (D2D) communications system 400 between devices (e.g., a first UE 450, a second UE 451, and/or a third UE 452).
  • a UE may be a vehicle (e.g., UE 450, 451), a mobile device (e.g., 452), or another type of device.
  • a UE may be a special UE, such as a road side unit (RSU).
  • RSU road side unit
  • FIGURE 5 illustrates an example of a V2X system 500 with an RSU 510 according to aspects of the present disclosure.
  • a transmitter UE 504 transmits data to an RSU 510 and a receiving UE 502 via sidelink transmissions 512. Additionally, or alternatively, the RSU 510 may transmit data to the transmitter UE 504 via a sidelink transmission 512.
  • the RSU 510 may forward data received from the transmitter UE 504 to a cellular network (e.g., gNB) 508 via an UL transmission 514.
  • the gNB 508 may transmit the data received from the RSU 510 to other UEs 506 via a DL transmission 516.
  • a cellular network e.g., gNB
  • the RSU 510 may be incorporated with traffic infrastructure (e.g., traffic light, light pole, etc.)
  • traffic infrastructure e.g., traffic light, light pole, etc.
  • the RSU 510 is a traffic signal positioned at a side of a road 520.
  • RSUs 510 may be stand-alone units.
  • FIGURE 6 illustrates a sidelink communications scheme 600 according to some aspects of the present disclosure.
  • the scheme 600 may be employed by UEs such as the UEs 104 in a network such as the network 100.
  • the x-axis represents time and the y-axis represents frequency.
  • a shared radio frequency band 601 is partitioned into multiple subchannels or frequency subbands 602 (shown as 602S0, 602S1, 602S2) in frequency and multiple sidelink frames 604 (shown as 604a, 604b, 604c, 604d) in time for sidelink communications.
  • the frequency band 601 may be at any suitable frequencies.
  • the frequency band 601 may have any suitable bandwidth (BW) and may be partitioned into any suitable number of frequency subbands 602. The number of frequency subbands 602 can be dependent on the sidelink communications BW requirement.
  • Each sidelink frame 604 includes a sidelink resource 606 in each frequency subband 602.
  • a legend 605 indicates the types of sidelink channels within a sidelink resource 606.
  • a frequency gap or guard band may be specified between adjacent frequency subbands 602, for example, to mitigate adjacent band interference.
  • the sidelink resource 606 may have a substantially similar structure as an NR sidelink resource.
  • the sidelink resource 606 may include a number of subcarriers or RBs in frequency and a number of symbols in time.
  • the sidelink resource 606 may have a duration between about one millisecond (ms) to about 20 ms.
  • Each sidelink resource 606 may include a PSCCH 610 and a PSSCH 620.
  • the PSCCH 610 and the PSSCH 620 can be multiplexed in time and/or frequency.
  • a sidelink resource 606 may also include a physical sidelink feedback channel (PSFCH), for example, located during the ending symbol(s) of the sidelink resource 606.
  • PSFCH physical sidelink feedback channel
  • a PSCCH 610, a PSSCH 620, and/or a PSFCH may be multiplexed within a sidelink resource 606.
  • the PSCCH 610 may carry SCI 660 and/or sidelink data.
  • the sidelink data can be of various forms and types depending on the sidelink application. For instance, when the sidelink application is a V2X application, the sidelink data may carry V2X data (e.g., vehicle location information, traveling speed and/or direction, vehicle sensing measurements, etc.). Alternatively, when the sidelink application is an IIoT application, the sidelink data may carry IIoT data (e.g., sensor measurements, device measurements, temperature readings, etc.).
  • the PSFCH can be used for carrying feedback information, for example, HARQ ACK/NACK for sidelink data received in an earlier sidelink resource 606.
  • the sidelink frames 604 in a resource pool 608 may be contiguous in time.
  • a sidelink UE e.g., the UEs 104 may include, in SCI 660, a reservation for a sidelink resource 606 in a later sidelink frame 604.
  • another sidelink UE e.g., a UE in the same NR-U sidelink system
  • the sidelink UE may transmit in the sidelink resource 606.
  • SCI sensing can assist a UE in identifying a target frequency subband 602 to reserve for sidelink communications and to avoid intrasystem collision with another sidelink UE in the NR sidelink system.
  • the UE may be configured with a sensing window for SCI sensing or monitoring to reduce intra-system collision.
  • the sidelink UE may be configured with a frequency hopping pattern.
  • the sidelink UE may hop from one frequency subband 602 in one sidelink frame 604 to another frequency subband 602 in another sidelink frame 604.
  • the sidelink UE transmits SCI 660 in the sidelink resource 606 located in the frequency subband 602s2 to reserve a sidelink resource 606 in a next sidelink frame 604b located at the frequency subband 602si.
  • the sidelink UE transmits SCI 662 in the sidelink resource 606 located in the frequency subband 602si to reserve a sidelink resource 606 in a next sidelink frame 604c located at the frequency subband 602S1.
  • the sidelink UE transmits SCI 664 in the sidelink resource 606 located in the frequency subband 602si to reserve a sidelink resource 606 in a next sidelink frame 604d located at the frequency subband 6O2so.
  • the sidelink UE transmits SCI 668 in the sidelink resource 606 located in the frequency subband 6O2so.
  • the SCI 668 may reserve a sidelink resource 606 in a later sidelink frame 604.
  • the SCI can also indicate scheduling information and/or a destination identifier (ID) identifying a target receiving sidelink UE for the next sidelink resource 606.
  • ID a destination identifier
  • a sidelink UE may monitor SCI transmitted by other sidelink UEs.
  • the sidelink UE may determine whether the sidelink UE is the target receiver based on the destination ID. If the sidelink UE is the target receiver, the sidelink UE may proceed to receive and decode the sidelink data indicated by the SCI.
  • multiple sidelink UEs may simultaneously communicate sidelink data in a sidelink frame 604 in different frequency subband (e.g., via frequency division multiplexing (FDM)).
  • FDM frequency division multiplexing
  • one pair of sidelink UEs may communicate sidelink data using a sidelink resource 606 in the frequency subband 602S2 while another pair of sidelink UEs may communicate sidelink data using a sidelink resource 606 in the frequency subband 602S1.
  • the scheme 600 is used for synchronous sidelink communications. That is, the sidelink UEs may be synchronized in time and are aligned in terms of symbol boundary, sidelink resource boundary (e.g., the starting time of sidelink frames 604).
  • the sidelink UEs may perform synchronization in a variety of forms, for example, based on sidelink synchronization signal blocks (SSBs) received from a sidelink UE and/or NR-U SSBs received from a BS (e.g., the BSs 105 and/or 205) while in-coverage of the BS.
  • SSBs sidelink synchronization signal blocks
  • the sidelink UE may be preconfigured with the resource pool 608 in the frequency band 601, for example, while in coverage of a serving BS.
  • the resource pool 608 may include a plurality of sidelink resources 606.
  • the BS can configure the sidelink UE with a resource pool configuration indicating resources in the frequency band 601 and/or the subbands 602 and/or timing information associated with the sidelink frames 604.
  • the scheme 600 includes mode-2 RRA (e.g., supporting autonomous radio resource allocation (RRA) that can be used for out-of-coverage sidelink UEs or parti al -coverage sidelink UEs).
  • RRA autonomous radio resource allocation
  • CV2X communication e.g., CV2X mode-4
  • SPS semi-persistent scheduling
  • sidelink control information is transmitted over a physical sidelink control channel (PSCCH) and the data is transmitted over a physical sidelink shared channel (PSSCH).
  • PSCCH physical sidelink control channel
  • PSSCH physical sidelink shared channel
  • a CV2X signal randomly varies from one subframe (SF) to another with different frequency allocations and received signal power for each subframe, which is less stable over time.
  • a CV2X transceiver transmits at a very low duty cycle (e.g., ⁇ 2%).
  • a CV2X transceiver may transmit once per one hundred milliseconds (100 msec), once per two hundred milliseconds (200 msec), or once per three hundred milliseconds (300 msec).
  • a CV2X receiver performs channel busy ratio (CBR) measurements to estimate a portion of sub-channels having a sidelink (SL) received signal strength indicator (S-RSSI) value exceeding a pre-defined threshold.
  • CBR channel busy ratio
  • SL sidelink
  • S-RSSI received signal strength indicator
  • a portion of the sub-channels are selected and used for transmission. Selecting the portion of sub-channels for transmission relies on accurate sidelink received signal strength indicator measurements. That is, the accuracy of the sidelink received signal strength indicator measurements is important for proper operation in a CV2X system.
  • the accuracy of the sidelink received signal strength indicator measurements during operation of the CV2X system may be degraded due to damaged cables and/or antennas of the CV2X system, for example, as shown in FIGURE 7.
  • FIGURE 7 is a block diagram illustrating a connected vehicle having a communications unit configured as a cellular vehicle-to-everything (CV2X) communications unit of a connected car application reference design (CCARD) automotive development platform, according to aspects of the present disclosure.
  • a communications unit 710 of a connected vehicle 700 is coupled to a first antenna 720 by a first cable link 730 and a second antenna 740 by a second cable link 750.
  • the accuracy of the sidelink received signal strength indicator measurements during operation of the connected vehicle 700 may be degraded due to damaged cables (e.g., 730/750) and/or antennas (e.g., 720/740) of the connected vehicle 700.
  • a cable loss between the communications unit 710 and the vehicle antennas varies from one car model to another (e.g., 1- 10 dB).
  • a typical car cable loss is between four (4) and five (5) decibels (e.g., 4-5 dB).
  • a compensation device may be added to compensate for the cable loss. In most cases, however, when the cable loss is below a predetermined loss amount, there is no way to detect and estimate the actual loss.
  • S-RSSI sidelink receive signal strength indicator
  • RSRP reference signal received power
  • Testing of the communications unit 710 is performed at an antenna device connector of the communications unit 710.
  • an output power limitation e.g., +20 dBm
  • an output power limitation e.g., +20 dBm
  • each cyclic-delay diversity (CCD) chain is limited to a predetermined power limit (e.g., +17 dBm) at the antenna device connector.
  • a predetermined boost amount e.g., 3 dB
  • the second antenna 740 of the connected vehicle 700 is corrupted due to a collision with an obstacle (e.g., during an accident).
  • the first cable link 730 is also corrupted.
  • car vendors that provide connected vehicles e.g., having CV2X systems
  • Detection of a corrupted cable link/vehicle antenna is desired in order to immediately repair the corrupted cable link/vehicle antenna to allow proper and secure operation of an alert system in the connected vehicle 700.
  • FIGURE 8 is a block diagram illustrating a communications system of a connected vehicle configured to compensate for damaged antennas and/or cable links of a connected vehicle, according to aspects of the present disclosure.
  • a communications system 800 includes a radio unit 810 (e.g., a CV2X device) coupled to an integrated circuit (IC) device 840 through a cable link 830.
  • the radio unit 810 is implemented using a connected car application reference design (CCARD) device.
  • the IC device 840 includes a hybrid coupler 860 configured for attachment to an antenna device connector 822 of a vehicle antenna 820.
  • the IC device 840 may be thin (e.g., a few millimeters) and have a small form factor.
  • the IC device 840 may be implemented within the antenna device connector 822 and/or the vehicle antenna 820.
  • the hybrid coupler 860 of the IC device 840 includes a first port 1 coupled to a multiplexor 870, which is coupled to the cable link 830.
  • the multiplexor 870 receives a high band radio frequency (RF) data signal through a high band pass path 872.
  • the multiplexor 870 also receives a voltage (Vcc) and an optional very low rate data signal through a direct current (DC) path 874.
  • the hybrid coupler 860 also includes a second port 2 coupled to the vehicle antenna 820 through the antenna device connector 822.
  • the hybrid coupler 860 further includes a third port 3 and a fourth port 4 coupled to a power detector 850.
  • the power detector 850 is configured to detect reflections from the vehicle antenna 820 to determine whether an antenna corruption is detected. For example, a return loss detected at the fourth port 4 of the hybrid coupler 860 is provided to a comparator 852, which is configured to compare the return loss to a power or voltage threshold (Vth). In one configuration, a corrupted antenna is detected when the return loss exceeds the power or voltage threshold Vth, according to the comparator 852 coupled to the fourth port 4 of the hybrid coupler 860. Although the comparator 852 is shown, an analog-to-digital convertor can be used instead, in which case the radio unit 810 determines whether the return loss exceeds the voltage threshold.
  • Vth power or voltage threshold
  • forward coupled power at the third port 3 of the hybrid coupler 860 is provided to an analog-to-digital converter (ADC) 854 of the power detector 850, which receives the voltage (Vcc) from the direct current (DC) path 874 of the multiplexor 870.
  • ADC analog-to-digital converter
  • the multiplexor 870 is configured with a capacitor C3 to provide the high band pass path 872 and an inductor L2 to provide the DC path 874.
  • the forward coupled power at the third port 3 of the hybrid coupler 860 is provided to a transceiver 856 of the power detector 850. In this configuration, the forward coupled power is transmitted to the radio unit 810, which enables the radio unit 810 to detect the transmitted power into the vehicle antenna 820.
  • the transceiver 856 of the power detector 850 is configured to wirelessly report a cable failure if the cable link 830 to the vehicle antenna 820 is disconnected.
  • the transceiver 856 transmits a very low rate data signal through a capacitor C2, the DC path 874 of the multiplexor 870 and through the cable link 830 to a capacitor Cl of the radio unit 810.
  • a reverse, very low data rate signal may be transmitted by the radio unit 810 to the transceiver 856 through a reverse path.
  • the high pass radio frequency (RF) data e.g., B47-RF
  • the voltage Vcc and the very low rate data signal are multiplexed from communication over the cable link 830.
  • the forward coupled power is measured at the third port 3 of the hybrid coupler 860.
  • the transceiver 856 of the power detector 850 sends the forward coupled power to the radio unit 810.
  • the forward coupled power is sent to the radio unit 810 by the transceiver 856 using a low frequency modulated signal (e.g., 100 kHz or any other frequency up to very high frequency (VHF)) over the cable link 830 (or a wireless device such as Bluetooth).
  • the radio unit 810 e.g., a CCARD device modem
  • the radio unit 810 performs a cable loss estimation based on the detected transmit power on the antenna side, which is referred to as the transmit power at the antenna device connector 822.
  • cable loss estimation is used by the radio unit 810 to refine estimation of a receive signal strength indicator (RS SI) as well as a reference signal received power (RSRP) as a function of the cable loss.
  • the radio unit 810 is configured to estimate a cable loss based on a difference between a device output power and a computed transmit power at the first port 1 of the hybrid coupler 860.
  • the radio unit 810 is configured to adjust a transmit power at the second port 2 of the hybrid coupler 860 according to the estimated cable loss and/or a computed return loss.
  • Aspects of the present disclosure are also applicable to corrupted/broken antenna detection as well as corrupted cable detection.
  • a transmit power of a connected vehicle transceiver is boosted through the radio unit 810 by adjusting a transmit power of the vehicle antenna 820 in response to detection of an estimated cable loss.
  • a connected vehicle transceiver e.g., a CV2X transceiver
  • a transmit power of the vehicle antenna 820 is boosted through the radio unit 810 by adjusting a transmit power of the vehicle antenna 820 in response to detection of an estimated cable loss.
  • cyclic-delay diversity supports boosting of a transmit power by a predetermined boost amount (e.g., up to 3 dB) when a cable loss is greater than or equal to a predetermined loss amount (e.g., > 3 dB).
  • WWAN wireless wide area network
  • MIMO multiple-input-multiple-output
  • the cable loss estimation is also used to boost each transmit chain power at the antenna device connector 822. For example for a cyclic-delay diversity (CDD), an output power is boosted from a first level (e.g., +17 dBm) to a boosted level (e.g., +23 dBm), for a cable loss greater than or equal to a predetermined loss value (e.g., > 3 dB).
  • a first level e.g., +17 dBm
  • a boosted level e.g., +23 dBm
  • the boosted level (e.g., +23 dBm) complies with the Federal Communications Commission (FCC) rule limit of +20 dBm (e.g., a total power of +23 dBm - 3dBm loss) at the antenna device connector 822.
  • FCC Federal Communications Commission
  • a CCARD device is configured to boost each antenna output power in a cyclic-delay diversity mode, a transmit diversity mode, or a multiple input multiple output (MEMO) mode based on the estimated cable loss.
  • FIGURES 7-8 are provided as examples. Other examples may differ from what is described with respect to FIGURES 7-8.
  • FIGURE 9 is a flow diagram illustrating an example process 900 performed, for example, by a UE according to a method of wireless communication, in accordance with various aspects of the present disclosure.
  • the example process 900 is an example of enhancements to compensate for a corrupted cable and/or a corrupted vehicle antenna of a connected vehicle.
  • the process 900 includes computing a transmit power at a first port in response to a received forward detected power measured at a third port (block 902).
  • the UE e.g., the radio unit 810 may compute the transmit power at the first port 1 in response to the received forward detected power measured at the third port 3 of the hybrid coupler 860.
  • the process 900 also includes computing a return loss of an antenna at a second port in response to a received antenna reflection power value measured at a fourth port (block 904).
  • the UE may compute the return loss of the antenna at the second port 2 in response to the received antenna reflection power value measured at the fourth port 4 of the hybrid coupler 860.
  • the process 900 includes estimating a cable loss based on a difference between a device output power and the computed transmit power at the first port (block 906).
  • the UE e.g., the radio unit 810 may estimate the cable loss based on the difference between the device output power and the computed transmit power at the first port 1 of the hybrid coupler 860.
  • the process 900 also includes adjusting a transmit power at the second port according to the estimated cable loss and/or the computed return loss (block 908).
  • the UE may adjust a transmit power at the second port 2 of the hybrid coupler 860 according to the estimated cable loss and/or the computed return loss.
  • the process 900 includes refining a received signal strength indicator (RS SI) measurement and a reference signal received power (RSRP) measurement based on the estimated cable loss.
  • RS SI received signal strength indicator
  • RSRP reference signal received power
  • a method of wireless communication by a user equipment (UE), comprising: computing a transmit power at a first port in response to a received forward detected power measured at a third port; computing a return loss of an antenna at a second port in response to a received antenna reflection power value measured at a fourth port; estimating a cable loss based on a difference between a device output power and the computed transmit power at the first port; and adjusting a transmit power at the second port according to the estimated cable loss and/or the computed return loss.
  • UE user equipment
  • adjusting comprises boosting each antenna output power in a cyclic-delay diversity mode, a transmit diversity mode, or a multiple input multiple output (MIMO) mode based on the estimated cable loss.
  • MIMO multiple input multiple output
  • adjusting comprises boosting a transmit output power of the second port as a function of the estimated cable loss.
  • An integrated circuit comprising: a hybrid cross-coupler comprising: a first port coupled to a cable output at a coupler input, a second port coupled to the first port and to an antenna port at a coupler output, a third port cross-coupled to the first port, and a fourth port cross-coupled to the second port and coupled to the third port; and a power detector coupled to the third port and to the fourth port, the power detector comprising a transceiver configured to report, to an connected vehicle, a forward detected power measured at the third port and a received antenna reflection power value measured at the fourth port.
  • the transceiver comprises a wireless transceiver.
  • An apparatus for wireless communication by a user equipment (UE), comprising: means for computing a transmit power at a first port in response to a received forward detected power measured at a third port; means for computing a return loss of an antenna at a second port in response to a received reflection value measured at a fourth port; means for estimating a cable loss based on a difference between a device output power and the computed transmit power at the first port; and means for adjusting a transmit power at the second port according to the estimated cable loss and/or the computed return loss.
  • the means for adjusting comprises means for boosting each antenna output power based on the estimated cable loss.
  • a user equipment comprising: a processor; a memory coupled with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the UE: to compute a transmit power at a first port in response to a received forward detected power measured at a third port; to compute a return loss of an antenna at a second port in response to a received antenna reflection power value measured at a fourth port; to estimate a cable loss based on a difference between a device output power and the computed transmit power at the first port; and to adjust a transmit power at the second port according to the estimated cable loss and/or the computed return loss.
  • the term “component” is intended to be broadly construed as hardware, firmware, and/or a combination of hardware and software.
  • a processor is implemented in hardware, firmware, and/or a combination of hardware and software.
  • 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, and/or the like.
  • “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).

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Selon l'invention, un procédé de communication sans fil, par un équipement d'utilisateur (UE), comprend le calcul d'une puissance d'émission au niveau d'un premier port en réponse à une puissance détectée directe reçue mesurée au niveau d'un troisième port. Le procédé comprend également le calcul d'un affaiblissement de réflexion d'une antenne au niveau d'un deuxième port en réponse à une valeur de réflexion reçue mesurée au niveau d'un quatrième port. Le procédé comprend aussi l'estimation d'une perte de câble en fonction d'une différence entre une puissance de sortie de dispositif et la puissance d'émission calculée au niveau du premier port. Le procédé comprend également l'ajustement d'une puissance d'émission au niveau du deuxième port en fonction de la perte de câble estimée et/ou de l'affaiblissement de réflexion calculé.
PCT/US2021/019479 2020-09-17 2021-02-24 Ajustement de puissance d'émission d'automobile en fonction de la perte de câble entre un dispositif et une antenne de voiture pour fournir des alertes en temps réel pour une antenne corrompue et un câble corrompu Ceased WO2022060407A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202021040395 2020-09-17
IN202021040395 2020-09-17

Publications (1)

Publication Number Publication Date
WO2022060407A1 true WO2022060407A1 (fr) 2022-03-24

Family

ID=74885084

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2021/019479 Ceased WO2022060407A1 (fr) 2020-09-17 2021-02-24 Ajustement de puissance d'émission d'automobile en fonction de la perte de câble entre un dispositif et une antenne de voiture pour fournir des alertes en temps réel pour une antenne corrompue et un câble corrompu

Country Status (1)

Country Link
WO (1) WO2022060407A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230076071A1 (en) * 2021-09-09 2023-03-09 Qualcomm Incorporated Transmit diversity power leakage detection and filtering in antenna compensator power detector
CN116774173A (zh) * 2023-07-06 2023-09-19 南京能智电子科技有限公司 一种雷达发射功率调节模块的故障数据识别系统
US11985073B2 (en) * 2010-11-03 2024-05-14 Avago Technologies International Sales Pte. Limited Multi-level video processing within a vehicular communication network

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040121742A1 (en) * 2002-12-23 2004-06-24 Abrams Ted A. Apparatus and method to monitor and control power
EP2983298A2 (fr) * 2014-08-06 2016-02-10 u-blox AG Module de compensateur destiné à une unité émetteur-récepteur, système radio et son procédé de fonctionnement
WO2019069119A1 (fr) * 2017-10-06 2019-04-11 Telefonaktiebolaget Lm Ericsson (Publ) Détection d'obstruction de champ et d'éléments défectueux de réseaux d'antennes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040121742A1 (en) * 2002-12-23 2004-06-24 Abrams Ted A. Apparatus and method to monitor and control power
EP2983298A2 (fr) * 2014-08-06 2016-02-10 u-blox AG Module de compensateur destiné à une unité émetteur-récepteur, système radio et son procédé de fonctionnement
WO2019069119A1 (fr) * 2017-10-06 2019-04-11 Telefonaktiebolaget Lm Ericsson (Publ) Détection d'obstruction de champ et d'éléments défectueux de réseaux d'antennes

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11985073B2 (en) * 2010-11-03 2024-05-14 Avago Technologies International Sales Pte. Limited Multi-level video processing within a vehicular communication network
US20230076071A1 (en) * 2021-09-09 2023-03-09 Qualcomm Incorporated Transmit diversity power leakage detection and filtering in antenna compensator power detector
US11901931B2 (en) * 2021-09-09 2024-02-13 Qualcomm Incorporated Transmit diversity power leakage detection and filtering in antenna compensator power detector
CN116774173A (zh) * 2023-07-06 2023-09-19 南京能智电子科技有限公司 一种雷达发射功率调节模块的故障数据识别系统

Similar Documents

Publication Publication Date Title
CN115943587B (zh) 在非许可侧行链路上的覆盖内网络控制的卸载
US12119913B2 (en) Sidelink beam failure recovery
US11916726B2 (en) Network assisted sidelink beam failure recovery
US11924902B2 (en) Directional sidelink (SL) beam failure detection
US11778572B2 (en) Lite SL-SS (sidelink synchronization signal) transmission for on demand S-SSB (sidelink synchronization signal block)
US11582720B2 (en) Vehicle-to-everything (V2X) inter-user equipment (UE) coordination
EP4144030A1 (fr) Indication de quasi-co-localisation (qcl) pour des communications de liaison latérale à points de transmission et réception (trp) multiples
US11723012B2 (en) Vehicle-to-everything (V2X) destination identification sharing for inter-user equipment (UE) coordination
US20250233622A1 (en) Reconfigurable intelligent surface (ris) reservation for sidelink communications
US12022562B2 (en) Sidelink radio resource management using sidelink discovery signal
US11540224B2 (en) Vehicle-to-everything (V2X) inter-user equipment (UE) coordination
WO2022060407A1 (fr) Ajustement de puissance d'émission d'automobile en fonction de la perte de câble entre un dispositif et une antenne de voiture pour fournir des alertes en temps réel pour une antenne corrompue et un câble corrompu
US20220141873A1 (en) Channel occupancy information multi-access reporting
WO2022115333A1 (fr) Détection de collision d'attribution de véhicule à tout cellulaire
US11831572B2 (en) Vehicle-to-everything (V2X) inter-user equipment (UE) coordination
WO2023039783A1 (fr) Informations de commande de liaison latérale (sci) de mini-intervalle découplées pour la planification et la réservation de ressources
KR20230026326A (ko) 사이드링크 통신들을 위한 감소된 감지 절차
WO2022036487A1 (fr) Résolution d'une inadaptation d'état de contrôle de ressources radio (rrc) pour des transmissions de véhicule à tout (v2x)

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21712671

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21712671

Country of ref document: EP

Kind code of ref document: A1