A communication system (1) comprises a central (100) and a peripheral (200). The central (100) receives location information and time information from NTP servers (10) and a location server (30). The central (100) creates first offset information of the time measured by its own device and the time information received from the NTP servers (10). The central (100) acquires from map information a time difference corresponding to a location presented by the location information received from the location server (30). The central (100) creates first updated time information based on the time measured by its own device, first offset information, and time difference corresponding to the location presented by the location information received from location server (30) and transmits the first updated time information to the peripheral (200). The peripheral (200) changes the time displayed by its own device based on the received first updated time information.

Disclosed is a system comprising a portable electronic device, and a backend device, wherein the portable electronic device is configured to, upon occurrence of a triggering event, send a first request message to the backend device, the backend device, upon receipt of the first request message, is configured to read an internal device clock and send a first response message to the portable electronic device, wherein the first response message comprises information about the present internal device time. The portable electronic device, upon receipt of the first response message, is further configured to at least one of update an internal clock of the portable electronic device with the present internal device time, and send a second response message to an object, wherein the second response message comprises an information about the present internal device time.

Provided is a broadcasting control apparatus configured to generate a system time for broadcasting control, the system time being synchronized with a reference time in accordance with a predetermined time protocol, and configured to correct, when leap second adjustment information indicating that leap second adjustment is scheduled to be completed at a first time in the reference time is received, the system time by a correction amount depending on a time length D over a correction period having the time length D from a second time earlier than the first time, the time length D being set such that a correction amount per second of the system time is equal to or less than a cycle corresponding to an inverse of a video frame rate.

Disclosed is a system comprising a portable electronic device, and a backend device, wherein the portable electronic device is configured to, upon occurrence of a triggering event, send a first request message to the backend device, the backend device, upon receipt of the first request message, is configured to read an internal device clock and send a first response message to the portable electronic device, wherein the first response message comprises information about the present internal device time. The portable electronic device, upon receipt of the first response message, is further configured to at least one of update an internal clock of the portable electronic device with the present internal device time, and send a second response message to an object, wherein the second response message comprises an information about the present internal device time.

Provided is a wireless time servicing method, device and system. The wireless time servicing method includes: obtaining absolute time information sent by an external clock source; correcting a system time of a master station according to the absolute time information; broadcasting path information to a slave station; receiving feedback from the slave station in response to the path information, calculating a transmission path delay between the master station and the slave station, and storing the transmission path delay in the time information; and sending the time information to the slave station.

Provided is a wireless time servicing method, device and system. The wireless time servicing method includes: obtaining absolute time information sent by an external clock source; correcting a system time of a master station according to the absolute time information; broadcasting path information to a slave station; receiving feedback from the slave station in response to the path information, calculating a transmission path delay between the master station and the slave station, and storing the transmission path delay in the time information; and sending the time information to the slave station.

A time information obtaining method is provided, including: receiving a first message (201), where the first message includes at least one piece of time information, and each piece of time information corresponds to a respective clock source; and obtaining, from the first message, time information corresponding to a clock source required by a terminal (202). A time information transmission method, a terminal, and a network device are further provided.

Time is appropriately corrected without needlessly consuming power. In step S101 and step S102, a CPU of an electronic timepiece determines whether to correct a time measured by a timekeeping circuit. Then, when a determination is made to correct the time measured by the timekeeping circuit, in step S111 and step S112, the time measured by the timekeeping circuit is corrected on the basis of time information held by a wireless device.

A method for calibrating a light smart watch includes: providing an FPC soft board under a dial, a size of the FPC soft board matching a size of the dial, the FPC soft board is divided into a plurality of partitions, each partition is insulated from other partitions, and each of watch hands and each partition form a capacitor in turn when the watch hands run; detecting a capacitance change amount of each partition, determining positions of partitions where the watch hands are currently located, and determining a current time indicated by the watch hands, according to the positions of partitions where the watch hands are currently located; comparing the current time indicated by the watch hands with a current time of a mobile terminal to determine a time error; and adjusting the watch hands, according to the time error to run in sync with the time of the mobile terminal.

A method for calibrating a light smart watch includes: providing an FPC soft board under a dial, a size of the FPC soft board matching a size of the dial, the FPC soft board is divided into a plurality of partitions, each partition is insulated from other partitions, and each of watch hands and each partition form a capacitor in turn when the watch hands run; detecting a capacitance change amount of each partition, determining positions of partitions where the watch hands are currently located, and determining a current time indicated by the watch hands, according to the positions of partitions where the watch hands are currently located; comparing the current time indicated by the watch hands with a current time of a mobile terminal to determine a time error; and adjusting the watch hands, according to the time error to run in sync with the time of the mobile terminal.