Title :
Using Diploidy Genetic Algorithm for Dynamic OVSF Code Allocation in WCDMA Networks
Author :
Karakoc, Mustafa ; Soke, Alev ; Kavak, Adnan
Author_Institution :
Dept. of Electron. & Comput. Educ., Kocaeli Univ., Izmit
Abstract :
In this paper, genetic algorithm (GA) was applied to orthogonal variable spreading factor (OVSF) code tree reassignment problem with adaptive population size, which is constructed according to existing OVSF code tree density. In order to improve the ability of GA, we employ so-called "dominance & diploidy" structure to adapt to changing traffic conditions. Simulation results show that the GA provides reduced code blocking probability and improved spectral efficiency in the system when compared to the conventional (CCA) and dynamic code assignment (DCA) schemes
Keywords :
code division multiple access; codes; genetic algorithms; telecommunication traffic; OVSF code tree density; WCDMA networks; adaptive population size; code tree reassignment problem; conventional code assignment scheme; diploidy genetic algorithm; dominance-and-diploidy structure; dynamic OVSF code allocation; dynamic code assignment scheme; orthogonal variable spreading factor; reduced code blocking probability; spectral efficiency; traffic conditions; Bandwidth; Base stations; Computer networks; Data communication; Genetic algorithms; Multiaccess communication; Resource management; Telecommunication traffic; Traffic control; Tree data structures; Code Allocation; Genetic Algorithm; OVSF Code Tree; WCDMA Networks;
Conference_Titel :
Radio and Wireless Symposium, 2007 IEEE
Conference_Location :
Long Beach, CA
Print_ISBN :
1-4244-0444-4
Electronic_ISBN :
1-4244-0445-2
DOI :
10.1109/RWS.2007.351778
