Multiple OVSF codes assignment with crowded branch first strategy in WCDMA systems

Authors:
Min-Xiou Chen
Affiliations:
Department of Computer Science and Information Engineering, Chunghua University, Hsinchu, Taiwan, R.O.C.
Venue:
ICCOM'07 Proceedings of the 11th Conference on 11th WSEAS International Conference on Communications - Volume 11
Year:
2007

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Abstract

In this paper, we consider the environment of using multiple OVSF codes to support a request with any data rate. This paper presents the Crowded Branch First strategy for multiple OVSF codes assignment system. Based on the new strategy and the code word generation method, the system can allocate the appropriated codes to each request under the constraint of assigned code amount, and under the constraint of the maximal resource waste ratio. The results show that using two or three codes is sufficient to achieve high performance.