Should a station not require its allocated transmission slot, another station may detect that cessation during a "mini-slot" and start its transmission. For example, to prevent a station from incorrectly perceiving a mini-slot;

• 1) each station must periodically send a message to the media coordinator to which the coordinator will respond, and any station not hearing the message from the requesting station, but hearing the response from the coordinator must drop out; or
• 2) the stations could send a request to send (RTS) to the media coordinator, which would send a clear to send (CTS), and only then would the station send its data. All stations in the network system would hear one or the other. The mini-slot would need to be of sufficient duration to have the RTS/CTS exchange. In addition, this last way allows peer to peer connectivity in general (unrelated to whether or not one is using some dynamic TDMA type of service).