DocumentCode :
3509228
Title :
A measurement based model for UMTS DL DCH dynamic bearer type switching
Author :
Karner, Wolfgang ; Nemethova, Olivia ; Rupp, Markus
Author_Institution :
Inst. of Commun. & Radio-Frequency Eng., Vienna Univ. of Technol., Austria
fYear :
2006
fDate :
16-18 Jan. 2006
Abstract :
3GPP specifications allow to change the physical resources allocated to the users dynamically to optimize the radio resource utilization in UMTS. Network operators can make use of this optimization feature by properly adjusting dynamic bearer type switching in their networks. In this paper we show an analysis of the dynamic bearer type switching based on measurements in a live UMTS network in the city center of Vienna, Austria. Particularly, we present the usage probability and the runlength distribution of the three different radio access bearers which are used for transmission over the UMTS DCH (dedicated channel) packet switched (PS) domain in DL (down link), namely 384 kbit/s, 128 kbit/s and 64 kbit/s bearer. For the performance evaluation of applications, system level simulators are used, where the lower layers are usually represented via stochastic models. Following the measured statistics we develop a model capable of properly describing the dynamic switching between the mentioned bearers. Furthermore, we show that a four-state Markov model with its geometrically distributed runlengths does not provide sufficient accuracy. We achieve an enhancement by using a four-state renewal process with Weibull distributed runlengths as presented in this document.
Keywords :
3G mobile communication; Markov processes; Weibull distribution; packet switching; radio access networks; telecommunication channels; 3GPP specifications; Austria; UMTS DL DCH dynamic bearer type switching; UMTS network; Vienna; Weibull distributed runlengths; dedicated channel; down link; four-state Markov model; four-state renewal process; geometrically distributed runlengths; measurement based model; network operators; optimization feature; packet switched domain; performance evaluation; radio access bearers; radio resource utilization; stochastic models; system level simulators; usage probability; 3G mobile communication; Cities and towns; Ear; Ink; Paramagnetic resonance; Postal services; Remotely operated vehicles; Statistics; Stochastic systems; Universal Serial Bus;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Pervasive Computing, 2006 1st International Symposium on
Print_ISBN :
0-7803-9410-0
Type :
conf
DOI :
10.1109/ISWPC.2006.1613577
Filename :
1613577
Link To Document :
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