Fixed wireless access system with autonomous resource assignment

This paper presents simulation studies of a class of autonomous, dynamic channel assignment (ADCA) protocols applied to a fixed wireless access (FWA) system utilizing TDMA as the multi-access technique. The terms ADCA refers to a call admission/rejection policy where initial time-slot assignment is based only on measurements of the total interference power. The measurement is carried out both by the base-station and the terminal prior to making a time-slot assignment. Once assigned, a time-slot may be replaced if conditions deteriorate. The FWA system uses narrow steerable antenna beams at the base-stations to point at the desired terminal during the assigned time-slot, thereby minimizing the interference generated by transmitters supporting other terminals during the same time-slot. It is shown that with this simple scheme high capacity can be achieved.