Abstract: A dual power supply transfer switch (SSATS) for switching between a first power supply (S1) and a second power supply (S2) to supply power to a load is provided, includes: a solid-state switch (SS); a mechanical switch (CTR); and a compensation power module (AUX). In the case that the S1 fails in supplying power to the load, the AUX uses the S2 to supply power to the load, and the output current of the S1 is reduced. After satisfying the turn off condition for the SS, the SS turns off the S1, the CTR turns off the S1 and turns on the S2. After the S2 is adjusted to synchronize with the phase of the output current of the S1, the SS turns on the S2 and the AUX stops outputting current. The SSATS provides advantages such as fast transfer, zero interruption, and short voltage sag time.

Abstract: A system architecture of a fast transfer switch is provided, which includes a main power loop configured to be connected to at least two power supplies, transfer between the at least two power supplies, and output an AC signal; a first parallel bypass module configured to output an AC signal, the first parallel bypass module including an independent power supply; the main controller is configured to, in response to detecting the abnormality of the first power supply of the at least two power supplies, adjust the AC signal output by the first parallel bypass module during the transfer of the main power loop between the at least two power supplies, so as to transfer from the first power supply outputting the AC signal via the main power loop to the second power supply of the at least two power supplies outputting the AC signal via the main power loop.

Abstract: There is provided a solid-state switch device connected between a single-phase power supply source and a load, including: a phase bridge arm circuit, including a first and a second power semiconductor switches, which each includes a first, a second and a control ends and each includes a body diode, wherein the second ends of the first and the second power semiconductor switches are connected in series in phase of a single-phase power supply source; a phase voltage sampling circuit, configured to acquire sampled values of phase voltage of the phase bridge arm circuit; and a control circuit, configured to determine direction of the phase voltage according to the sampled values, turn on one of the power semiconductor switches whose body diode direction is the same as the direction of the phase voltage, and turn on the other within a half cycle after the immediate zero-crossing of the phase voltage.

Abstract: The present disclosure provides a control circuit and a control method of a bistable permanent magnet mechanism. The control circuit includes five switches, a diode and a control unit for controlling the five switches to be turned on and turned off. The control circuit enables the positive and the negative of the current passing through the coil to be adjustable at any time and avoids load breaking, without a complicated design of a driving circuit, thereby reducing the cost. It can also realize PWM control, adapt to a larger current range and different bistable permanent magnet mechanisms, and has a wide range of application scenarios.

Abstract: A method of detecting forward and reverse connection of a three-phase motor is disclosed, including: turning on a first solid-state switch pair and a second solid-state switch pair into conduction for a predetermined period of time so that current can flow between a power supply and the three-phase motor; detecting output current of a solid-state motor starter; and determining the forward and reverse connection state of the three-phase motor based on the output current of the solid-state motor starter, in a case that currents exist at a first output terminal and a second output terminal, it is determined that the three-phase motor is in the forward connection state, and in a case that currents exist at the first output terminal and a third output terminal, it is determined that the three-phase motor is in the reverse connection state. Furthermore, a solid-state motor starter is disclosed.

Abstract: An uplink transmission control method and a terminal are provided. The method includes: monitoring uplink cancellation signaling at a first moment; determining, according to the uplink cancellation signaling, whether to cancel corresponding uplink transmission, where an interval between the first moment and a second moment of sending the uplink transmission is greater than or equal to a preset time length, and the first moment is before the second moment.

Abstract: A solid-state motor starter which includes three electronic switching modules is disclosed. The solid-state motor starter includes: an energy absorbing circuit, which includes a transient diode array including at least one transient diode branch, each branch includes at least one transient diode connected in series in the same direction, and the branches are connected in parallel in the same direction, and the transient diode array has a cathode and an anode connection end; a first and a second three-phase bridge rectifier circuit, which are composed of rectifier diodes. The input or output of each electronic switching module is connected to the midpoint of one of the bridge arms of the first or second three-phase bridge rectifier circuit. The positive poles and the negative poles of the first and second three-phase bridge rectifier circuit are connected to the cathode and anode connection end of the transient diode array.

Abstract: Embodiments of this disclosure provide a method for 2-step random access and a terminal. The method includes: receiving one or more pieces of configuration information for 2-step random access; and determining a transmission resource and/or a transmission mode based on the configuration information and assistance uplink transmission information, and performing uplink transmission.

Abstract: A hybrid automatic repeat request acknowledgement (HARQ-ACK) processing method includes: selecting at least a part of HARQ-ACK bits as a first HARQ-ACK bit from a first HARQ-ACK codebook according to at least one of information indicated by DCI corresponding to the first HARQ-ACK codebook or indexes of carriers where PDSCHs corresponding to the first HARQ-ACK codebook are located, and according to at least one of a quantity of multiplexed HARQ-ACK bits or a code rate of HARQ-ACK transmission; and discarding the first HARQ-ACK bit; or determining a first HARQ-ACK bit from a first HARQ-ACK codebook according to at least one of the information indicated by the DCI or the indexes of carriers; and multiplexing the first HARQ-ACK bit and HARQ-ACK bits in a second HARQ-ACK codebook. The first HARQ-ACK bit is at least a part of HARQ-ACK bits in the first HARQ-ACK codebook.

Abstract: The embodiments of the present disclosure provide a processing method and device. The method includes: receiving a redundancy version RV sequence, where an RV identity for last N transmission opportunities in the RV sequence is 0 or 3, and N is a positive integer; and decoding a retransmission position according to an RV identity order indicated by the RV sequence.

Abstract: Embodiments of the present disclosure provide a feedback method for a semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH) and a terminal device, and relate to the field of communication technologies. The method includes: determining, when a plurality of SPS PDSCHs are configured in one slot, a feedback information codebook of the SPS PDSCHs according to a quantity of the SPS PDSCHs configured and a capability of the terminal device, where the capability of the terminal device is used for indicating a maximum quantity N of PDSCHs that the terminal device can decode in one slot.

Abstract: This application pertains to the field of communication technologies, and discloses a terminal operation method and apparatus, a terminal, and a network-side device. The terminal operation method in embodiments of this application includes: receiving, by a terminal, at least one random access channel RACH configuration transmitted by a network-side device, where each of the at least one RACH configuration includes at least one target resource, and the target resource includes at least one of a physical random access channel transmission occasion RO resource and a physical uplink shared channel occasion PO resource; and performing, by the terminal, a first operation based on the at least one RACH configuration, where the first operation includes at least one of the following: determining validity of the target resource; and determining whether to transmit a random access message on the target resource.

Abstract: This application discloses a method and apparatus for determining a physical random access channel (PRACH) transmission resource, and a terminal. The method for determining the physical random access channel transmission resource of embodiments of this application includes: performing, by a terminal, a target operation of a PRACH transmission resource based on a target configuration, where the target configuration includes at least one of: a configuration of a duplex mode and a configuration of a flexible time division duplex TDD mode; and the target operation includes at least one of: determining the validity of the PRACH transmission resource; determining whether to transmit on the PRACH transmission resource; and determining the PRACH transmission resource.

Abstract: An SSB indication method includes UE receives first indication information sent by a network side device, where the first indication information is used to indicate related information of an SSB of the network side device. UE performs a target-related operation based on the first indication information, where the target-related operation is an operation related to a transmission state of the SSB. The related information of the SSB includes at least one of the following that the SSB is in a disabled state or an enabled state, a disabled time or an enabled time of the SSB, a disabled pattern or an enabled pattern of the SSB, validity of an RACH occasion corresponding to the SSB, or a state mask of the SSB on an RACH occasion corresponding to the SSB.

Abstract: A resource configuration method includes receiving, by a terminal, one or more pieces of CSI-RS resource configuration information sent by a network side device; and performing, by the terminal, channel measurement and report or interference measurement and report on a target resource based on the one or more pieces of CSI-RS resource configuration information, where the CSI-RS resource configuration information is used to configure at least one first CSI-RS resource configuration; at least one second CSI-RS resource configuration; or at least one third CSI-RS resource configuration; the first CSI-RS resource configuration is used for a first resource; the second CSI-RS resource configuration is used for a second resource; and the third CSI-RS resource configuration is used for a third resource.

Abstract: This application discloses a transmit power determining method and apparatus, a terminal, and a network side device. The transmit power determining method includes: receiving, by a terminal, L pieces of configuration information sent by a network side device; and determining, by the terminal based on the L pieces of configuration information, a transmit power for performing uplink transmission on a target uplink resource. The L pieces of configuration information include first power control configuration information and/or at least one piece of second power control configuration information, and L is greater than or equal to 1. The first power control configuration information is used to determine a transmit power of the terminal for performing uplink transmission on a first uplink resource. Each piece of the second power control configuration information is used to determine a transmit power of the terminal for performing uplink transmission on a second uplink resource.

Abstract: Embodiments of the present disclosure provide a transmission method and a device. The method includes: determining first spatial information; and receiving, in CSS and/or USS according to the first spatial information, a random access response message of a 2-step random access procedure triggered by beam failure recovery (BFR). The terminal can receive, in common search space and/or UE-specific search space, the random access response message of the 2-step random access procedure triggered by the beam failure recovery (BFR), so that reliability of a communications system can be improved.

Abstract: A method of configuring an uplink grant-free transmission and a device thereof are provided. The method includes: acquiring a transmission location of an uplink grant-free transmission according to a current configuration parameter; acquiring, according to the transmission location, a corresponding subframe time slot, and initiating the uplink grant-free transmission to a network side on the subframe time slot; where the current configuration parameter includes one or more of: a starting location, a subframe internal offset and a transmission period, where the starting location includes a starting location indicated by a system frame number and a subframe number or a starting location indicated by a subframe number.

Abstract: According to an aspect of the present disclosure, there is provided a switching circuit including a main power supply circuit connected between power sources and a load, wherein the power sources include a first power source and a second power source, and the main power supply circuit includes a transfer switch connected between the power sources and the load and configured to switch between the first power source and the second power source; and a power electronic switch for turning on or off the main power supply circuit, wherein the power electronic switch is connected between the transfer switch and the load.

Abstract: This disclosure provides a random access method and apparatus, and user equipment, and belongs to the field of wireless communications technologies. The random access method is applied to user equipment and includes: in a case that a time domain resource for a random access message conflicts with a time domain resource indicated by a network-side message, performing any one of the following: transmitting the random access message on the time domain resource for the random access message; canceling transmission of the random access message; delaying transmission of the random access message; and ignoring the network-side message.