Abstract: A method is dedicated to broadcasting multimedia data in multimedia sessions set up in an FDMA/TDMA type communication network comprising cells associated with base stations adapted to broadcast the multimedia data to mobile communication terminals. This method consists in, on the one hand, controlled synchronization, relative to a reference clock, of the times of broadcasting identical multimedia data relating to the same multimedia session in each base station that the multimedia session concerns and, on the other hand, configuration of each of the base stations concerned so that they broadcast the identical multimedia data of the multimedia session during chosen periods by means of at least one chosen common carrier frequency and in at least one common chosen time slot.

Abstract: A cell changing method for a packet-mode cellular mobile radio system, in which method information relating to resources allocated to a mobile station in a new cell is signaled by the network to said mobile station when said mobile station is still in the old cell and information intended to enable the mobile station to determine a timing advance to be applied by said mobile station in the new cell is also signaled by the network to said mobile station when said mobile station is still in the old cell.

Abstract: A device for linearizing transmitter amplifiers for transmitter equipment including a plurality of transmitters (11, 12, . . . 1n), each including a transmitter amplifier (4) and not totally decoupled from each other, said device including means for controlling the transmission of linearization signals relative to each amplifier and means (6) for analyzing the corresponding amplified linearization signals to determine the non-linearities of said amplifier and applying to wanted signals a pre-correction (5) to compensate said non-linearities, said device being essentially characterized in that it includes central control means (8, 8′, 10-20) for commanding the transmission of linearization signals relating to different transmitter amplifiers at different times.