Title :
Comparison of code reservation schemes at the forward link in WCDMA
Author :
Rouskas, Angelos N. ; Skoutas, Dimitrios N.
Author_Institution :
Dept. of Inf. & Commun. Syst. Eng., Univ. of the Aegean, Samos, Greece
Abstract :
We examine resource reservation schemes for the management of orthogonal variable spreading factor (OVSF) codes at the forward link of 3G mobile communications systems employing WCDMA. Like in every multiservice network, different rate calls in 3G systems will perceive dissimilar system performance if no measures are taken and the channelization code tree is treated as a common pool of resources. The paper introduces complete sharing, complete partitioning and hybrid partitioning strategies to manage the code tree, and studies the performance in terms of blocking probability per traffic rate class and utilization of codes. It turns out that fair access to codes by different rate calls and code utilization are conflicting goals, and that hybrid schemes can provide a compromise between these two extremes.
Keywords :
3G mobile communication; code division multiple access; data communication; multiuser channels; probability; radio links; radio networks; spread spectrum communication; telecommunication traffic; 3G mobile communications systems; OVSF codes; WCDMA; blocking probability per traffic rate class; channelization code tree; code reservation; complete partitioning; complete sharing; forward link; hybrid partitioning; multiservice network; orthogonal variable spreading factor codes; resource reservation; system performance; variable data rate services; 3G mobile communication; Access protocols; Multiaccess communication; Resource management; Scattering; System performance; Telecommunication traffic; Traffic control;
Conference_Titel :
Mobile and Wireless Communications Network, 2002. 4th International Workshop on
Print_ISBN :
0-7803-7605-6
DOI :
10.1109/MWCN.2002.1045720