Abstract: In a communication system including a plurality of user terminals in a full-mesh network and a network-control-station terminal, control-function data is communicated between an individual user terminal and the network-control-station terminal in a given TDMA-frame communication channel while the given TDMA-frame communication channel is also being used for communicating user-communication data between user terminals. The control-function data and the user-communication data are communicated within control-function time slots and user-communication time slots respectively of the given TDMA-frame communication channel. The time slots for such communications are dynamically assigned in response to time-slot assignment signals communicated from the network-control-station terminal when the communication link between the user terminals is established.