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Most of 3G and beyond WCDMA networks use orthogonal variable spreading factor (OVSF) code tree for channelization codes. The codes in the code tree are limited and the performance of wireless network depends upon the code assignment to new calls. The paper aims to provide mathematical description for number of codes searched prior to assigning one (or more) suitable vacant code(s) to new call. To...
IEEE 802.16 broadband wireless access system (BWA) is a promising emerging technology. In the IEEE 802.16 standard, multiple data transmission rates are defined by employing different modulation and channel coding schemes. How to select a proper mode affects the system performance significantly. In this paper, an efficient link rate adaptation algorithm, named QoS-aware link rate adaptation (Q-LRA),...
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