Abstract: The present disclosure discloses a demodulation reference signal (DMRS) port configuration information obtaining method, a DMRS port configuration information delivery method, and an apparatus, and relates to the field of communications technologies, to reduce signaling overheads. The DMRS port configuration information obtaining method may include: receiving, by user equipment (UE), indication information sent by a base station, where the indication information includes overview information of DMRS ports of all UEs scheduled by the base station; and obtaining, by the UE, DMRS port configuration information of all the UEs according to a preset rule and the indication information.

Abstract: Example communication methods and communications apparatus are described. One example method includes determining power of a demodulation reference signal (DMRS) by a terminal device. The terminal device sends the DMRS based on the determined power. In embodiments of this application, the power of the DMRS can be flexibly determined for different communication statuses.

Abstract: Some embodiments of this disclosure include apparatuses and methods for a media access control (MAC) level operation that enables a transmitter and a receiver to select low-density parity check (LDPC) codewords that are HARQ retransmitted. The operations described herein provide for reducing the number of codewords that need to be retransmitted, minimizing the overhead needed to signal the feedback from a receiver to a transmitter, and allowing a transmitter to control which codewords are retransmitted.

Abstract: This disclosure relates to transmitting multicast information over a network, such as a wireless local area network (WLAN). A source device may transmit a multicast and a request for feedback to a plurality of sink devices. The sink devices may transmit feedback based on whether they successfully decoded the multicast. The source device may retransmit the multicast (or a portion thereof) based on the feedback.

Abstract: Some embodiments of this disclosure include apparatuses and methods for a PHY level operation that enables a transmitter and a receiver to select low-density parity check (LDPC) codewords that are HARQ retransmitted. The operations described herein provide for an increased reliability in detecting codewords at the physical (PHY) layer, as the codeword detection does not depend on detection of a media access control (MAC) protocol data unit (MPDU) start position and length. For example, the PHY layer may store failed codewords without instructions from the MAC layer. This providers for faster and simpler implementation of the PHY layer. Additionally, the operations described herein reduce overhead requirements as the MAC layer may stores a bit stream of correctly received codewords, which requires less the storage space required to store failed codewords. Furthermore, a feedback signal transmitted from a receiving device to a transmitting device may further reduce the number of retransmitted codewords.

Abstract: Some embodiments include utilizing a multilink media access control (MAC) address structure to support multilink devices (MLDs) that can operate concurrently in more than one link such as extremely high throughput (EHT) access points (APs) and EHT stations (STA), where the multilink MAC address structure is compatible with legacy devices. An EHT AP can utilize a multilink basic service set (BSS) identification (BSSID) MAC address to communicate with an EHT STA identified by a multilink MAC address. Values of the multilink BSSID and the multilink MAC address of the EHT STA are independent of which of the multiple links are used in the communication. In addition, to utilizing a multilink BSSID, the EHT AP can also support unique link-specific MAC addresses to concurrently support legacy and MLD stations. The EHT STA can also utilize unique link-specific MAC addresses that can be different than the EHT AP's link-specific MAC addresses.

Abstract: A transmit/receive RF system for a magnetic resonance examination system is described.

Abstract: A reference signal transmission method and a communications device are described. The method includes determining, by a first communications device, a first frequency band based on a first initial resource index, a second initial resource index, a first configured bandwidth, and a second configured bandwidth. The first initial resource index is greater than or equal to the second initial resource index, and the first initial resource index is less than or equal to a sum of the second initial resource index and the second configured bandwidth. The method further includes receiving, by the first communications device, a reference signal on the first frequency band. When this application is implemented, an actual transmission bandwidth of the reference signal can be accurately determined.

Abstract: A data transmission method includes: selecting, by a network device, at least one target time domain resource from a plurality of candidate time domain resources, where the at least one target time domain resource is used to carry a demodulation reference signal (DMRS); and sending, by the network device, first indication information to a terminal device, where the first indication information is used to indicate the at least one target time domain resource.

Abstract: This application provides a reference signal sending and receiving method, a network device, and a terminal device. The method includes: determining, by a network device, a transmit power used to transmit a reference signal, where the transmit power is related to a quantity of ports carried on an RE occupied by the reference signal; and sending, by the network device, the reference signal based on the transmit power.

Abstract: Disclosed is a method for preparing aromatic hydrocarbons, particularly relates to the preparation of the aromatic hydrocarbons by passing methanol and carbon monoxide through a reactor loaded with an acidic ZSM-5 molecular sieve catalyst containing no metal additive under reaction conditions. Compared with the prior art, the method provided by the present invention can improve and stabilize the selectivity to aromatic hydrocarbons, particularly BTX, by adding carbon monoxide in methanol aromatization, and also prolongs the single-pass life of the catalyst. The performance of an inactivated catalyst is not significantly degraded after repeated regenerations. Furthermore, the catalyst preparation process omits the step of adding a metal additive, so that not only the process is simplified, but also costs are greatly reduced, and environmental protection is facilitated.

Abstract: A method for indicating downlink control signaling and a related device are provided. The method includes: generating, by an access network device, indication information, and sending the indication information to a first terminal device by using downlink control signaling, where the indication information is used by the first terminal device to obtain information about an antenna port that is used by a second terminal device and that is corresponding to a demodulation reference signal, and the second terminal device is a terminal device currently performing spatial multiplexing together with the first terminal device. This implements interference detection performed by the first terminal device on a plurality of users.

Abstract: An interface circuit in an electronic device (such as an access point) may utilize a configurable wake-up-frame format. During operation, the interface circuit may receive a wake-up-radio (WUR)-setup request associated with a recipient electronic device, where the WUR-setup request specifies a proposed configurable wake-up-frame format. In response, the electronic device may determine the configurable wake-up-frame format to be used based at least in part on the proposed configurable wake-up-frame format. Then, the interface circuit may provide a WUR-setup response intended for the recipient electronic device, where the WUR-setup response specifies the configurable wake-up-frame format selected for use. Note that the configurable wake-up-frame format may specify a payload length in a wake-up frame and/or one or more operations of at least one of the recipient electronic device or the electronic device after the wake-up frame is transmitted by the electronic device.

Abstract: Techniques, systems, devices, and methods for utilizing a mobile communicator for communicating with multiple satellites, e.g., simultaneously over an interval of time, are disclosed. The mobile communicator is disposed on a vehicle, and the multiple satellites may be disposed in different satellite constellations operating in different orbits. The mobile communicator establishes multiple communication links to the multiple satellites by utilizing only the set of antenna resources provided by a single antenna platform or array. Subsets of the antenna resources are dynamically apportioned and adapted, e.g., while the vehicle travels, to establish and maintain different communication links to different satellites via different spatial channels and their respective air interfaces to thereby maintain optimal satellite communicative connectivity. On-board connectivity services for personal electronic devices and/or other on-board applications may be supported by the disclosed techniques.

Abstract: Provided is a method for preparing a lower unsaturated fatty acid ester, which comprises carrying out an aldol condensation reaction between dimethoxymethane (DMM) and a lower acid or ester with a molecular formula of R1—CH2—COO—R2 on an acidic molecular sieve catalyst in an inert atmosphere to obtain a lower unsaturated fatty acid or ester(CH2?C(R1)—COO—R2), wherein R1 and R2 are groups each independently selected from the group consisting of H— and C1-C4 saturated alkyl group.

Abstract: Methods for performing error recovery during a ranging procedure may include negotiation one or more ranging parameters, including a set of secure training sequences and receipt of a first ranging frame that may include a first dialog token and may have an appended first secure training sequence. The first ranging frame may be decoded based on the first dialog token but not correlated based on the first secure training sequence. A first acknowledgment that may include an appended second secure training sequence may be transmitted. The second secure training sequence may be associated with a prior dialog token. A second ranging frame that may include a second dialog token and may have an appended third secure training sequence may be received. The second ranging frame may be decoded based on the third dialog token and correlated based on the third secure training sequence.

Abstract: An LED light source, comprising one or more LED modules (100-800), wherein each of the LED modules (100-800) comprises an LED (110) and a circuit board (120), the LED (110) being fixed to the circuit board (120), electrodes (121, 122) being arranged on the circuit board (120), and pins of the LED (110) being electrically connected to electrodes (121, 122); the LED light source also comprises a bearing structure (10), wherein the bearing structure (10) is provided with a plurality of bearing surfaces (13, 14, 23, 24, 33, 34) for bearing the LED modules (100-800), and various bearing surfaces (13, 14, 23, 24, 33, 34) are arranged such that the normal directions of at least two bearing surfaces are different; and the LED light source also comprises a drive circuit arranged in an enclosure (1) thereof, wherein various LEDs (D3-D10) are connected in series between a current output end and a current input end of the drive circuit.

Abstract: The present invention relates to a device for integrally processing a housing of a Computing, Communication, and Consumer (3C) product. The device includes a loading frame and an upper frame, where a material receiving device is arranged in the loading frame, a width of the loading frame is greater than that of the housing, a grinding device is arranged below the upper frame, and the grinding device includes a grinding movement device; the grinding movement device is connected to a grinding installation block, an outer side of the grinding installation block is provided with grinding lifting balls, a grinding arc block is embedded in an inner side of an upper portion of the grinding installation block, and the upper frame is also provided with a material pressing device. An outer side of the loading frame is provided with a feeding and discharging device.

Abstract: The present disclosure proposes a modeling method and apparatus for diagnosing an ophthalmic disease based on artificial intelligence, and a storage medium. The modeling method includes: establishing a data collection of ophthalmic images and a data collection of non-image ophthalmic disease diagnosis questionnaires; training a first neural network model by employing the data collection of the ophthalmic images to obtain a first classification model; training a second classification model by employing the data collection of non-image ophthalmic disease diagnosis questionnaires; and merging the first classification model and the second classification model to obtain a target classification network model, in which, a test result outputted by the target classification network model is used as a diagnosis result of the ophthalmic disease.

Abstract: During operation, an interface circuit in an electronic device may receive, from a second electronic device (such as an access point in a WLAN), an uplink trigger frame that may specify an access category. In response to the uplink trigger frame, the electronic device may first include data associated with the specified access category in one or more frames, and then may transmit the one or more frames to the second electronic device. Moreover, when all the data associated with the specified access category has been transmitted or when there is no data associated with the specified access category, and when there is leftover time in an allocation associated with the uplink trigger frame, the interface circuit may transmit the one or more frames to the second electronic device with additional data associated with another access category that is different from the specified access category.