A system and method are disclosed for admission control of mobile conversational user sessions by a satellite network is described. When a request to admit a new session over a satellite network is received, the radio access bearer setup request is transmitted to a remote terminal of the satellite network. The system determines if a requested guaranteed bit rate for the new session is available from the remote terminal. If the requested guaranteed bit rate is available, the terminal forwards the request to a gateway of the satellite network. The new session is subsequently admitted over the satellite network and allocated the requested guaranteed bit rate.