User registration in broadband slotted Aloha networks

This paper proposes an algorithm for user terminals in broadband slotted Aloha networks to jointly succeed in time synchronization, power adjustment, and registration to the network control center. The performance is analyzed considering nonnegligible initial time uncertainty, nonnegligible power uncertainty, and minimizing cochannel interference as well as binary feedback from the central receiver. User terminal initial power setting can be performed using the method developed in this paper to make sure the interference generated in the registration stage is negligible. The algorithm is sufficient to keep the false registration probability less than any number required by the network. It can help broadband slotted Aloha networks to significantly reduce system cost through employing a large number of inexpensive user terminals with non-negligible time uncertainty and nonnegligible power uncertainty.