DCA with power-shaping (PS-DCA) in TDMA and TD/CDMA cellular systems with centralized and distributed control

In this paper we investigate a new dynamic resource allocation technique for TDMA and TD/CDMA cellular radio systems with full frequency reuse. Unlike traditional allocation strategies, that first allocate the time slots and then perform power control, the proposed technique first assigns in advance (static allocation) a maximum power level to each channel and then dynamically performs channel allocation and fine power control. This is done by exploiting a set of suitably reused power profiles that partially organize the intercell and intersector interference in the available slots and make it partially predictable. We show that this technique, originally proposed by the Authors for fixed broadband wireless access systems, where interference is mitigated by the use of highly directional antennas, is able to increase the capacity of systems with and without centralized or partially centralized resource management control. Moreover, it is also able to fill the efficiency gap between centralized and not centralized strategies. In our investigation a greedy algorithm for resource allocation suitable for both centralized and not centralized management is also proposed.