Direct content redistribution between users belonging to the same community is enabled. A portable telephone set issues a request to a community management server to register portable telephone sets belonging to a community, in association with the community, and the community management server performs community registration. The portable telephone sets issue requests to the community management server for permission to redistribute content which has been distributed from a CP server, and when the redistribution permission request is for registered portable telephone sets belonging to the same community, the community management server grants permission for the redistribution. By this means, content redistribution can be performed directly between users belonging to the same community, without the intervention of the CP server.