Abstract: Disclosed herein are related to devices and methods for communication. In one aspect, a device includes a first processor and a second processor. The first processor may be configured to generate a first set of packets associated with an application data unit in a first layer corresponding to content data. Each packet of the first set of packets may include a flag indicative of an association with the application data unit. The second processor may be configured to generate a second set of one or more packets in a second layer for transmission, in response to determining that the first set of packets is associated with the application data unit according to flags of the first set of packets. The second processor may be configured to schedule to transmit the second set of one or more packets in the second layer within a defined time period.

Abstract: An encryption method and device and a decryption method and device are provided, to resolve a problem that unconditional security of encrypted service data cannot be ensured in an existing service data encryption process and encryption processing of highly confidential service data cannot be implemented. The encryption device in the present invention obtains a quantum key and to-be-encrypted service data; encrypts the to-be-encrypted service data by using the quantum key, to generate a ciphertext; inserts the ciphertext into a specified byte in an OTN overhead byte, and performs encapsulation to obtain an OTN frame including the ciphertext; and converts the OTN frame from an electrical signal to an optical signal, and transmits the optical signal to a second OTN device.

Abstract: A centrifugal switching device of a single-phase induction motor includes a centrifuge and pressure switches. The centrifuge includes a centrifugal sleeve, a centrifugal base, shaft coupling blocks, and a spring. The spring is directly fitted on the centrifugal base. Under a centrifugal force generated by the rotation of the motor, shaft coupling blocks I and II slide axially against an axial force of the spring, thus forcing an axial end surface of the centrifugal sleeve to be separated from contacts of the pressure switches, such that a starting winding of a stator ferrite-core coil of the single-phase induction motor is disconnected and a heater is turned on. The shaft coupling blocks I and II adopt a design with round transition, central sliding contact, and smooth rotation, thereby achieving a simple structure, convenient mounting, and safety usage.

Abstract: A centrifugal switching device of a single-phase induction motor includes a centrifuge and pressure switches. The centrifuge includes a centrifugal sleeve, a centrifugal base, shaft coupling blocks, and a spring. The spring is directly fitted on the centrifugal base. Under a centrifugal force generated by the rotation of the motor, shaft coupling blocks I and II slide axially against an axial force of the spring, thus forcing an axial end surface of the centrifugal sleeve to be separated from contacts of the pressure switches, such that a starting winding of a stator ferrite-core coil of the single-phase induction motor is disconnected and a heater is turned on. The shaft coupling blocks I and II adopt a design with round transition, central sliding contact, and smooth rotation, thereby achieving a simple structure, convenient mounting, and safety usage.