Abstract: A navigation method includes steps of: repeatedly emitting, by a wheel speed sensor, a pulse signal to a processor of a vehicle when the vehicle starts to travel from a start point of a route of a map; in response to receipt of a preset number of the pulse signals transmitting, by the processor, the preset number of the pulse signals to a portable device; calculating, by the portable device, a current position of the vehicle on the map based on a distance associated with the preset number of the pulse signals; and transmitting, by the portable device, data of the map having the current position to the processor so as to display the same.

Abstract: A power management method for a vehicle is provided, and includes: upon a power switch of the vehicle being switched from a conductive state to a non-conductive state, controlling an electrical system of the vehicle to temporarily supply a wireless communication module of the vehicle with electric power and activating a timer; determining whether an elapsed time has reached a predetermined duration according to the timer; when the determination is affirmative, controlling the electrical system to stop supplying electric power; and when the determination is negative, controlling the timer to stop timing upon the power switch being switched from the non-conductive state to the activated state.

Abstract: A navigation method includes steps of: repeatedly emitting, by a wheel speed sensor, a pulse signal to a processor of a vehicle when the vehicle starts to travel from a start point of a route of a map; in response to receipt of a preset number of the pulse signals transmitting, by the processor, the preset number of the pulse signals to a portable device; calculating, by the portable device, a current position of the vehicle on the map based on a distance associated with the preset number of the pulse signals; and transmitting, by the portable device, data of the map having the current position to the processor so as to display the same.

Abstract: A method includes steps of: establishing a wireless connection between a dashboard device of a vehicle and a mobile device; recording a position of the mobile device as an entry of recorded position data at predetermined time intervals; transmitting a notification signal to the mobile device via the wireless connection to enable the mobile device to make a determination as to whether the mobile device is currently able to receive a positioning signal; and determining the position of the mobile device based on the positioning signal to serve as the last position of the vehicle in the affirmative, and determining the last position of the vehicle based on a latest entry of the recorded position data when otherwise.

Abstract: A method for updating firmware of a vehicle which includes a dashboard device and a power device and which is communicable with a mobile device storing a program file is provided. The method includes: a) receiving, when the dashboard device is powered by the power device, and after a wireless connection between the dashboard device and the mobile device is established, a data stream of the program file from the mobile device via the wireless connection; b) making a pause in receiving the data stream when it is determined that the wireless connection is interrupted; c) resuming receiving the data stream after recovering the wireless connection from interruption; and d) repeating steps b) and c) so as to continue with data transfer of the program file from the mobile device.

Abstract: A power management method for a vehicle is provided, and includes: upon a power switch of the vehicle being switched from a conductive state to a non-conductive state, controlling an electrical system of the vehicle to temporarily supply a wireless communication module of the vehicle with electric power and activating a timer; determining whether an elapsed time has reached a predetermined duration according to the timer; when the determination is affirmative, controlling the electrical system to stop supplying electric power; and when the determination is negative, controlling the timer to stop timing upon the power switch being switched from the non-conductive state to the activated state.

Abstract: A method includes steps of: establishing a wireless connection between a dashboard device of a vehicle and a mobile device; recording a position of the mobile device as an entry of recorded position data at predetermined time intervals; transmitting a notification signal to the mobile device via the wireless connection to enable the mobile device to make a determination as to whether the mobile device is currently able to receive a positioning signal; and determining the position of the mobile device based on the positioning signal to serve as the last position of the vehicle in the affirmative, and determining the last position of the vehicle based on a latest entry of the recorded position data when otherwise.

Abstract: A file transfer method adaptive to a server is disclosed. The file transfer method includes following steps: dividing the file into a plurality of fragments; sending a piece of validation data of the file to at least one client based on TCP; multicasting the plurality of fragments to the at least one client based on UDP; determining whether a command from the at least one client questing for reissuing to send a lost part of the plurality of fragments is received; sending the lost part of the plurality of fragments to the corresponding client based on TCP when the command is received.

Abstract: A file transfer method adaptive to a server is disclosed. The file transfer method includes following steps: dividing the file into a plurality of fragments; sending a piece of validation data of the file to at least one client based on TCP; multicasting the plurality of fragments to the at least one client based on UDP; determining whether a command from the at least one client questing for reissuing to send a lost part of the plurality of fragments is received; sending the lost part of the plurality of fragments to the corresponding client based on TCP when the command is received.

Abstract: In a method for providing a network service, a registration signal for waiting is received from a second client device through the network service server when a first client device is utilizing a network service provided by a network service server. Information about the second client device is registered on a waiting list through the network service server. A connection signal is received from a third client device through the network service server when the first client device is disconnected from the network service server. The connection signal from the third client device is utilized for the third client device to request the network service provided by the network service server. The network service is provided to the third client device through the network service server when the information about the third client device is on the waiting list. The present invention also discloses a network service server.