I have tried to calculate the GoS for a TETRA/PMR network but I have no idea how to handle group calls in this cellular networks. The problem is that one group call can occupy a channel (time slot)on several base stations but on the other hand more people can talk to each other(possibly more than the ammount of the BS´s). So, how can I calculate the erlang of one user who making group call (half duplex), individual calls (HD), Data,…