A method is provided for managing a transfer of a data stream received by a mobile terminal of a first network to a second network, the terminal having subscribed to at least one multicasting group receiving the data stream, and being connected to the first network by way of an access router for the first network, termed the first router. The method comprises: detecting, by an access router for the second network, termed the second router, an arrival of the terminal in the second network; obtaining, by the second router, information relating to at least one multicasting group to which the terminal has subscribed, on the basis of a reading of a subscription table; and receiving the data stream by the second router, on the basis of the information obtained, and retransmission to the terminal.