Abstract: A cellular communication system is provided comprising a terminal, a base station (for example UMTS) and a communication equipment designed to transmit data to a terminal and which is not provided with an uplink channel (for example using an OFDM technique). By transmitting via the TCP channel data other than those for controlling the power of the receiver base station, the terminal can control the power of the OFDM system transmitting high speed data to the terminal, the OFDM system being coupled to the UMTS network with which the terminal communicates.

Abstract: An embodiment of the invention relates to the management of communications in a communication network comprising at least one transmitting device and at least one terminal which is adapted to receive data. The inventive management method comprises the following steps: establishment of a communication between one of the terminals, called the destination terminal, and one of the transmitting devices, called the transmitting device, using a first communication mode which is based on a single-carrier modulation; and passing to a second communication mode using a multicarrier modulation, with a communication channel that uses the multicarrier modulation being assigned to the communication between the transmitting device and the destination terminal. According to the inventions, said first and second communication modes are carried out successively in an alternating manner. The invention also relates to the corresponding signal, transmitting device and destination terminal.