1827results about How to "Reduce communication costs" patented technology

A navigation system includes an information center and a navigation device installed in a probe vehicle. The information center stores limiting information for specifying a content of probe information in accordance with predefined factors, specifies a predefined factor corresponding to a navigation device, selects the limiting information based on the specified predefined factor, transmits the selected limiting information to the navigation device, and receives the corresponding probe information transmitted from a navigation device. The navigation device receives the limiting information from the information center, collects probe information, selects only the probe information specified by the received limiting information for transmission to the information center, and transmits the selected probe information to the information center.

The communications terminal comprises: a playback device which playbacks content; a reading device which reads in access information recorded on a prescribed recording medium, the access information being necessary for downloading the content which can be played back by the playback device, via a network; a communications device which downloads via communications the content corresponding to the access information according to the access information read in; a storage device which stores the downloaded content, the storage device storing details of the access information in association with the content, the details of the access information being used in downloading the content; a judging device which judges whether or not the content corresponding to the read access information is present in the storage device, according to information which is stored in the storage device, when the access information is read in by the reading device; and a control device which controls the playback device, the reading device, the communications device, the storage device, and the judging device, wherein: if the judging device judges that the content is present in the storage device, the control device controls for acquiring the content corresponding to the access information read in from the storage device, and for playing back the content; and if the judging device judges that the content is not present in the storage device, the control device controls for downloading the content corresponding to the access information read in, and for playing back the content.

The invention discloses a cloud SIM card pool system, and the system comprises at least one SIM card pool device which is provided with a plurality of card slots for placing different physical SIM cards; an SIM card pool management center which selects optimal communication paths to distribute SIM card data corresponding to the physical SIM cards to terminal communication equipment according to a distribution strategy and the state of the terminal communication equipment, and distributes a plurality of optimal communication paths; and at least one piece of terminal communication equipment which reports the current state to the SIM card pool management center, obtains the most matched SIM card data distributed by the SIM card pool management center, visits an authentication algorithm of a corresponding physical SIM card through the plurality of optimal communication paths, obtains the corresponding answer data, simulates the operation environment of the physical SIM cards, and enables the SIM card data to be converted into virtual SIM cards for use. The system achieves the dynamic distribution of the SIM cards through the SIM card pool management center, enables the terminal communication equipment to be able to use the most proper SIM card in the world, and achieves intelligentization.

Vehicles are connected to respective receptacles of houses and are capable of generating commercial AC power to supply the generated electric power to a power transmission line. The vehicles communicate with a management server via the houses and the power transmission line. The vehicles output to the management server such information items concerning the vehicles as vehicle ID, amount of generated electric power and remaining amount of fuel. When electric power shortage occurs, the management server generates a start command and a power generation command for the vehicles based on the information concerning the vehicles to output the generated commands to the vehicles.