Distribution admission control in wireless communication networks: Power control and channel allocation for capacity maximization

Transmitter power control in wireless communication networks makes possible the efficient co-existence of communication links of a given quality in the same channel, increasing the capacity of the network through higher channel reuse. Existing power control algorithms exhibit the problem that, as new users (transmission links) attempt to access the channel, the signal-to-interference ratios (SIR) of already established (active) ones can temporarily drop below acceptable threshold, compromising transmission quality and rendering the communication links unreliable. Moreover, if their desired SIR requirements are not achievable, then the power control process becomes unstable, leading to violent SIR fluctuations for operational links.;A suite of power control algorithms with active link protection are presented in this dissertation, which maintain the SIR of operational (active) links above their required lower thresholds at all times (link quality protection), while new users are being admitted. Furthermore, when new users cannot be successfully admitted (and thus have to be blocked and rejected), established ones do not suffer SIR fluctuations below their required thresholds values.;A suite of admission/rejection control algorithms is also presented based on the power control algorithms. They exercise voluntary and/or forced drop-out for some users (links) which cannot achieve their SIR requirements in the channel, so as to reduce interference and facilitate the admission of some other ones. A channel probing method for quick determination of the admissibility of a link to facilitate access of multichannels is proposed. With channel probing, both the access time and transmitter power are substantially reduced.