Abstract: In an outbound transmission control method, a satellite network device segments an application layer packet into a plurality of Message Data Convergence Protocol (MDCP) protocol data units (PDUs) at an MDCP layer. The satellite network device sequentially delivers the MDCP PDUs to a satellite link control (SLC) layer as SLC service data units (SDUs) at the SLC layer, and segments the SLC SDU into N SLC PDUs at the SLC layer. SLC PDUs of one or more users are obtained at a physical layer (PHY) from the SLC layer. The SLC PDUs of the one or more users are spliced together at the PHY to form outbound data of a physical slot with a fixed length. The satellite network device in turn sends the outbound data to one or more terminals.

Abstract: In accordance with an embodiment, a method includes: encoding, by a first terminal at a satellite link control (SLC) layer, a first user identification (ID) of the first terminal into binary first data, wherein the first user ID comprises second data and third data, the binary first data includes binary fourth data and binary fifth data, the binary fourth data is obtained by encoding sixth data, the sixth data is obtained by compressing the second data, a data length of the sixth data is less than that of the second data, and the binary fifth data is obtained by encoding the third data; filling, by the first terminal at the SLC layer, the binary first data in a user ID field in frame header information of a first user frame; and sending, by the first terminal, the first user frame to a satellite network device.

Abstract: A payment method and an electronic device, the method including displaying, by a first device, a first interface in response to a first operation of a user, where the first interface comprises location information and identification information of one or more electronic devices, and the location information of the one or more electronic devices is determined using at least one of an ultra-wideband (UWB) protocol or a Bluetooth low energy (BLE) protocol, determining a second device from the one or more electronic devices in response to a second operation of the user on the first interface, wherein the first device is first one of a payer device or a payee device, and the second device is a second one, different from the first one, of the payer device or the payee device, and transacting, by the first device, with the second device.

Abstract: When approaching a card reader device, the electronic device receives a near field communication NFC field strength sensing message and indication information, where the indication information is used to indicate an application identifier AID corresponding to a virtual card, and the virtual card is a card that is not activated in the electronic device, or the indication information is an application data packet, and the application data packet does not include information about an AID; and when the indication information is used to indicate the AID corresponding to the virtual card, the electronic device executes a transaction with the card reader device by using the virtual card, and displays information about the virtual card in a first application, or when the indication information is the application data packet, the electronic device does not display the information about the first application.

Abstract: A method includes after a user touches a near-field communication (NFC) tag on a second electronic device using a first electronic device having an NFC function, a plurality of functions can be implemented simultaneously. For example, after the user holds a mobile phone to touch an NFC tag on a television, the mobile phone establishes a wireless connection to the television, and synchronizes a video being played on the mobile phone with the television for playing.