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Performance Enhancement of Call Admission Control in an Adaptive Array Antenna System  

Kim, Min-Jung
Kim, Nak-Myeong
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.29, no.9A, 2004 , pp. 1013-1021 More about this Journal
Abstract
In the WCDMA mobile multimedia communication system, the adaptive array antenna IS adopted to improve the performance of the system by reducing inter-user interference using antenna beam control. Usually, the interference resulted from the higher data rate users is much more significant to the lower data rate users than the other way around, so the overall performance can be enhanced by reducing the interference from higher data rate users. In order to maximize the efficiency of adaptive antenna operation, an optimal call admission control, especially during handoff, adaptive to the data rates is a critical problem. In this paper, We propose a call admission control algorithm based on the Soft QoS concept for the efficient processing of the handoff of higher data rate calls, and an adaptive handoff control mechanism according to the data rates. The proposed algorithm has been evaluated by computer simulation that it accommodates high data rate users among many lower data rate users much better, and the average call blocking probability for lower rate users becomes much lower than the conventional call admission control algorithm.
Keywords
WCDMA; Call Admission Control; Adaptive Array Antenna;
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