Open AccessA Study on RAT Selection Algorithms in Combined UMTS/GSM Networks
Author(s) -
Leijia Wu,
Kumbesan Sandrasegaran
Publication year - 2007
Publication title -
ecti transactions on electrical eng. / electronics and communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.148
H-Index - 7
ISSN - 1685-9545
DOI - 10.37936/ecti-eec.200862.171789
Subject(s) - umts frequency bands , gsm , umts terrestrial radio access network , computer science , radio resource management , algorithm , computer network , selection (genetic algorithm) , customised applications for mobile networks enhanced logic , selection algorithm , cellular network , key (lock) , heterogeneous network , wireless network , wireless , radio access network , mobile telephony , base station , telecommunications , mobile radio , artificial intelligence , mobile station , gsm services , computer security
The future wireless network is expected to be a heterogeneous system, which integrates different Radio Access Technologies (RATs) through a common platform. A major challenge arising from this heterogeneous network is Radio Resource Management (RRM) strategy. Common RRM (CRRM) has been proposed in the literature to jointly manage radio resources among a number of overlapped RATs in an optimized way. Currently, the RAT selection algorithm is one of the key research areas of CRRM. This paper studies RAT selection algorithms in co-located UMTS/GSM networks. In this paper, a three complex algorithm called IN*VG*Load is proposed based on improvements on the IN*VG algorithm. The simulation results show that the IN*VG*Load algorithm can optimize the system performance in highly loaded combined UMTS/GSM networks. A new algorithm suitable for low to medium loaded UMTS/GSM networks is also proposed and simulation results are presented in this paper.