Code Placement and Replacement Strategies for Wideband CDMA OVSF Code Tree Management
IEEE Transactions on Mobile Computing
Efficient OVSF Codes Assignment Strategy and Management Architecture in Wideband CDMA
BROADNETS '04 Proceedings of the First International Conference on Broadband Networks
Wireless Personal Communications: An International Journal
Efficient OVSF Code Assignment and Reassignment Strategies in UMTS
IEEE Transactions on Mobile Computing
Maximally flexible assignment of orthogonal variable spreading factor codes for multirate traffic
IEEE Transactions on Wireless Communications
A tree partitioning dynamic policy for OVSF codes assignment in wideband CDMA
IEEE Transactions on Wireless Communications
Reducing internal and external fragmentations of OVSF codes in WCDMA systems with multiple codes
IEEE Transactions on Wireless Communications
Code reservation schemes at the forward link in WCDMA
Computer Communications
Dynamic assignment of orthogonal variable-spreading-factor codes in W-CDMA
IEEE Journal on Selected Areas in Communications
IEEE Journal on Selected Areas in Communications
Reducing wastage capacity in OVSF based CDMA networks using dynamic rake combiners
WSEAS TRANSACTIONS on COMMUNICATIONS
Graph model for optimal OVSF code placement strategies
International Journal of Ad Hoc and Ubiquitous Computing
Fair Single Code and Multi Code Designs for 3G and Beyond CDMA Systems
Wireless Personal Communications: An International Journal
Top Down Code Search to Locate An Optimum Code and Reduction in Code Blocking for CDMA Networks
Wireless Personal Communications: An International Journal
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The key feature of the third-generation (3G) wireless communication networks is the ability to dynamically support a variety of multimedia service. In order to satisfy the requirements of multimedia services with variable data rates, the orthogonal variable spreading factor (OVSF) codes, adopted by the third-generation partnership project technical specifications, are used as channelization codes. This paper presents a fast and efficient code word generation method for multiple codes assignment system. Our code word generation method can find the optimal code word under the constraint of an assigned code amount, under the constraint of a maximal resource waste ratio, and under the constraint of realistic situation of the current residual codes. The computational complexity of the code word generation method is bounded by the amount of the assigned OVSF code, and by the layers of the OVSF code tree. From the simulation results, we show that using two or three codes or the resource waste ratio is =