Abstract: In some embodiments, one or more wireless stations operate to configure direct communication with neighboring mobile stations, e.g., direct communication between the wireless stations without utilizing an intermediate access point. Embodiments of the disclosure relate to a mechanism for a wireless station to discover a neighboring peer wireless station, e.g., via peer-to-peer Wi-Fi communications, receive a synchronization beacon(s) from the neighboring peer wireless station, and synchronize timing with the neighboring peer wireless station based at least in part on the synchronization beacon(s). In addition, the wireless station may transmit, e.g., via Wi-Fi peer-to-peer communications, a data beacon to one or more neighboring wireless devices stations, wherein the one or more neighboring wireless stations are configured to synchronize timing with the wireless station based on the data beacon.

Abstract: This invention provides a method for preparing ethylene glycol by hydrolyzing ethylene glycol monomethyl ether.

Abstract: This disclosure includes a transmission scheme indication method, and a data transmission method, apparatus, and system, pertaining to the field of communications technologies. The transmission scheme indication method includes: generating transmission scheme indication information, where the transmission scheme indication information is used to indicate one of at least two transmission schemes included in a current transmission mode, and the at least two transmission schemes include a beamforming transmit diversity transmission scheme; and sending the transmission scheme indication information. This application resolves a problem of relatively low flexibility in UE data transmission, and improves flexibility in UE data transmission. This application is used for data transmission.

Abstract: An information processing method is provided and applied to a multiple-input multiple-output (MIMO) communications system, where a plurality of data demodulation reference signal ports are allocated to UE, and the method includes: obtaining, in a scheduled time-frequency resource, information about whether the plurality of data demodulation reference signal ports allocated to the UE meet a particular port relationship, where meeting the particular port relationship means that signals sent by using any ports experience same or similar large-scale properties; and sending an indication of the information about whether the particular port relationship is met, so that for at least two data demodulation reference signal ports that meet the particular port relationship, the UE performs channel estimation, frequency offset estimation, or demodulation by using same parameters.

Abstract: Embodiments of the present invention disclose a reference signal transmission method, a related device, and a communications system. The method includes: determining a time-frequency resource occupied by at least one reference signal in at least one resource unit, where each of the at least one resource unit includes a first part and a second part, the first part and the second part occupy different symbols, any symbol occupied by the first part is in front of any symbol occupied by the second part; and sending the reference signal by using the determined time-frequency resource. According to the embodiments of the present invention, a receive end device can be more time-effective during data demodulation.

Abstract: An indicia encoding system is disclosed herein that encodes integrated information on products and/or services selected for purchase and payment information for purchasing the selected products and/or services, in accordance with a variety of embodiments involving various methods, devices and systems. In one illustrative embodiment, a method may include entering purchase order information via one or more input/output components. The purchase order may include an indication for one or more products and/or one or more services. The method may also include entering payment information, including information on a method of payment, via one or more input/output components. The method may also include generating a machine-readable indicia that encodes both the purchase order information and the payment information, with the payment information in an encrypted form; and displaying the machine-readable indicia on a screen.

Abstract: Disclosed herein are system, method, and computer program product embodiments for selectively decoding a multicast subframe in a multi-user frame for a wireless communications protocol. Embodiments include transmitting a request frame including a multicast group address for a multicast group to an access point (AP). The AP can determine a multicast identifier for the multicast group based on the multicast group address in the request frame. The AP can also transmit a response frame including the determined multicast identifier to a station (STA). The STA can receive a multi-user frame containing a multicast subframe from the AP. The STA can determine whether the multicast subframe is destined for the STA based on the determined multicast identifier and a multicast identifier stored in a preamble of the multi-user frame. The STA can determine whether to decode the multicast subframe based on the determination of whether the multicast subframe is destined for the STA.

Abstract: The present invention provides a self-draining oil buoyancy regulating device for underwater robots, wherein the accumulator, lower hatch cover, hatch trunk, upper hatch cover and bladder are connected; the water-proof connector is fixed on the upper hatch cover; the depth-pressure sensor is settled on the lower hatch cover; the upper valve block, hydraulic-operated check valve and lower valve block are connected; the lower valve block is fixed on the lower hatch cover; the pump outlet pressure sensor and the accumulator pressure sensor are on the lower valve block; the directional valve and the upper valve block are connected; the hydraulic pump motor assembly and the relief valve are both connected with the lower valve block; the depth-pressure sensor, pump outlet pressure sensor and accumulator pressure sensor are all connected with the control panel; the control panel is connected with the external power supply and the host computer.

Abstract: Embodiments of the present disclosure relate to the communications field, and provide a signal transmission method and apparatus, which can effectively resolve a resource waste problem of user data resource elements and improve system power utilization. The method includes: determining, by a base station, a first parameter value of a user data resource element (RE), an initial parameter value of a demodulation reference signal resource element (DMRS RE), and a compensation parameter value of the DMRS RE; determining, by the base station according to the initial parameter value and the compensation parameter value, a second parameter value required for transmitting a DMRS; and transmitting, by the base station, the DMRS, the user data, and the compensation parameter value to user equipment, so that the user equipment demodulates the user data.

Abstract: Systems and methods are directed to improving speech signal recognition. A method includes obtaining a spatial audio signal; separating a continuous speech signal and a corresponding directivity flag signal for a sound source direction from the spatial audio signal; and combining the continuous speech signal with the corresponding directivity flag signal for the sound source direction to generate a speech activation detection signal for the sound source direction. Because the speech activation detection signal of the sound source direction is obtained by combining the continuous speech signal with the directivity flag signal of the sound source direction, the speech activation detection signal has directivity, reducing the interference from continuous speech signal in other sound source directions.

Abstract: An interface circuit in an electronic device may receive, from an access point associated with the electronic device, a frame with management information that enables the electronic device to use a spatial-reuse technique, where the electronic device, through the spatial-reuse technique, adjusts a transmit power and a channel-availability sensing threshold. Moreover, the management information may specify parameters for the spatial-reuse technique. Then, the electronic device may transmit, using the spatial-reuse technique, one or more frames to the access point based on the parameters. Furthermore, the electronic device may transmit, to the access point, feedback information that indicates communication performance during the communication between the electronic device and the access point. For example, the feedback information may include a retry rate and, more generally, communication-performance information. This feedback information may be used by the access point to modify the parameters.

Abstract: A basic bandwidth wireless local area network (WLAN) device or station (STA) is assigned to a secondary channel. The basic bandwidth STA may be a 20 MHz STA. On the secondary channel, the basic bandwidth STA operates in a wideband mode recovering received data transmitted from an access point (AP) as part of a high bandwidth physical layer protocol data unit (PPDU). The STA and the AP can be members of a basic service set (BSS). The high bandwidth PPDU may be, for example, a 40 MHz, 60 MHz, or 80 MHz PPDU. Once on the secondary channel, the STA relies on the AP to perform channel sensing and scheduling activities, thus reducing power consumption at the STA and increasing the efficiency of the BSS. Several signaling formats are provided for indicating the secondary channel that the STA is assigned to or requests to move to.

Abstract: This application provides a data sending method, a data receiving method, a data sending apparatus, and a data receiving apparatus. The method includes: precoding, by a transmit end device, a plurality of spatial flows, to obtain a plurality of precoded data streams, and transmitting the plurality of precoded data streams, where at least two spatial flows in the plurality of spatial flows are obtained by performing transmit diversity processing on one original spatial flow. In this way, some spatial flows in a plurality of spatial flows on a same time-frequency resource can be transmitted in a transmit-diversity-based beamforming transmission manner, and other spatial flows can be transmitted in a spatial multiplexing manner, thereby improving time-frequency resource utilization.

Abstract: An unencrypted media access control layer (MAC) protocol data unit (MPDU) having a header is received at a wireless network interface device. The header includes a sequence number. The wireless network interface device uses the sequence number to encrypt data in the unencrypted MPDU to generate an encrypted MPDU, and transmits the encrypted MPDU.

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: Embodiments of present invention disclose a reference signal sending method. The method includes: determining a time-frequency resource occupied by a reference signal of at least one antenna port in a transmission unit, the transmission unit includes a first part and a second part, any symbol in the first part is different from any symbol in the second part, the time-frequency resource is on a single symbol or a plurality of consecutive symbols within the first part, reference signals of each antenna port occupy a same symbol, and the single symbol or each of the plurality of consecutive symbols carries a reference signal of at least one antenna port; and sending the reference signal to user equipment on the time-frequency resource. In the embodiments of present invention, a reference signal mapping rule and an antenna port mapping solution that are applicable to an NR MIMO system are formulated.

Abstract: In some embodiments, one or more wireless stations operate to configure direct communication with neighboring mobile stations, e.g., direct communication between the wireless stations without utilizing an intermediate access point. Embodiments of the disclosure relate to a mechanism for a device to trigger, via a first interface, service discovery over a second interface. In some embodiments, the service discovery can involve the exchange of one or more Bloom filters.

Abstract: The present invention provides a method for producing methyl acetate, and the method comprises a step in which dimethyl ether and a raw gas containing carbon monoxide and hydrogen go through a reactor loaded with a catalyst for carrying out a carbonylation reaction; wherein the catalyst contains an acidic EMT zeolite molecular sieve. The present invention has provided a new method for producing methyl acetate. In the method of the present invention, the carbonylation is carried out in the presence of the catalyst containing the acidic EMT zeolite molecular sieve, and the reaction activity is high, and the stability has been significantly improved, meeting the requirement of industrial production.

Abstract: The present disclosure relates to a magnetic resonance imaging device and shimming methods on the magnetic resonance imaging device. The magnetic resonance imaging device includes a main magnet, gradient coils, a vacuum enclosure, and a shimming conduit. The vacuum enclosure is configured to house at least part of the shimming conduit. The vacuum enclosure and at least part of the shimming conduit defines a hermetically sealed space configured to house the gradient coils. The shimming conduit has at least one opening configured to allow for access to an interior of the shimming conduit. The interior of the shimming conduit is hermetically insulated from the hermetically sealed space.

Abstract: An access point selects a channel access policy for an electronic device in a wireless local area network (WLAN). During operation, an interface circuit of the access point receives a channel access preference from the electronic device. The channel access preference includes: a multi-user trigger-based channel access technique, a single-user contention-based channel access technique, or both. The interface circuit selects the channel access policy for the electronic device based, at least in part, on the received channel access preference. The channel access policy can also be selected based at least in part on a communication performance metric associated with communication in the WLAN. The interface circuit communicates the selected channel access policy to the electronic device, which subsequently accesses a communication channel and communicates packets with the access point in accordance with the channel access policy.