Method for downloading data preceded by information signals

摘要

The invention relates to a process for transmitting and a process for receiving update data. According to the invention, the update data are dispatched by a communication center to terminals with the aid of a broadcasting network. Next, the terminals report their update to the center through a bidirectional network. The center renews the campaign or stops the current campaign as a function of the number of terminals updated. When only a minimum number of terminals to be updated remains, the campaign is stopped, the last terminals not updated will be so via the bidirectional link.;The invention also relates to the center implementing a dispatch process and the receiver for receiving and processing the update data.

主权项

1. A process for transmitting update data by a communication center to a plurality of terminals, said process comprises the steps:
broadcasting of an update campaign through a broadcast network, the broadcasting consisting of dispatching announcement signals which are transmitted before update data; formulating of a bi-directional communication, along a bi-directional channel distinct from the broadcast network, between the communication center and at least some of the terminals, each terminal transmitting an indication of a state of the update to each respective terminal to the communication center; determining at the communication center, the number of terminals actually updated as a function of the number of terminals being updated, being halted, or terminals triggered by a new update campaign; launching, by a terminal from said at least some of the terminals which is coupled to said bi-directional communication link during which an announcement signal is transmitted from the communication center to said coupled terminal, said announcement signal indicating that update data is available through said bi-directional communication link, and receiving update data through said bi-directional link when said coupled terminal is a non updated terminal after the end of said new update campaign.