Abstract: Embodiments of the present application disclose a near field communication method and a mobile terminal. After receiving an AID selection command that is used for initiating an NFC service and that is sent by an NFC controller, the AP parses the AID selection command to obtain a target AID. Then, the AP searches the AID routing table to obtain a first destination address corresponding to the target AID. If an object corresponding to the first destination address is an SE, the AP establishes a first link between the AP and the SE. The AP sends, to the SE, all subsequently received service data that belongs to the same NFC service as the AID selection command, until the AP receives a new AID selection command.

Abstract: Embodiments of the present invention provide a method, system and device for clock transmission between a sender and a receiver. The sender generates clock information of a clock to be sent relative to a system clock and sends a data packet containing the clock information to the receiver over a Packet-Switched Network (PSN). The receiver obtains the clock information in the data packet received and obtains the clock sent by the sender according to the clock information and the system clock. According to the embodiments of the present invention, after the clock of the sender is transmitted over the PSN, the receiver may obtain the clock of the sender without being affected by such damage as a network delay jitter and a packet loss.

Abstract: Embodiments of the present invention provide a method, system and device for clock transmission between a sender and a receiver. The sender generates clock information of a clock to be sent relative to a system clock and sends a data packet containing the clock information to the receiver over a Packet-Switched Network (PSN). The receiver obtains the clock information in the data packet received and obtains the clock sent by the sender according to the clock information and the system clock. According to the embodiments of the present invention, after the clock of the sender is transmitted over the PSN, the receiver may obtain the clock of the sender without being affected by such damage as a network delay jitter and a packet loss.