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Time Slot Assignment for Cellular SDMA/TDMA Systems with Adaptive Antennas
Yoshitaka HARA Yunjian JIA Toshihisa NABETANI Shinsuke HARA
IEICE TRANSACTIONS on Communications
Publication Date: 2004/04/01
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technology
SDMA, slot assignment, adaptive arrays, land mobile radio cellular systems, wireless communication,
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This paper presents time slot assignment algorithms applicable to uplink of space division multiple access (SDMA)/time division multiple access (TDMA) systems with adaptive antennas. In the time slot assignment process for a new terminal in a cell, we consider not only the signal quality of the new terminal but also that of active terminals in the same cell. Intra-cell hand over is performed for an active terminal when its signal quality deteriorates. We evaluate the blocking and forced termination probabilities for pure TDMA systems, sectorized systems, and SDMA/TDMA systems in cellular environments by computer simulations. The simulation results show that the SDMA/TDMA systems have much better performance than the pure TDMA and sectorized systems.