Title :
A fuzzy inference system for the handoff decision algorithms in the virtual cell layout based tactical communications systems
Author :
Onel, Tolga ; Ersoy, Cem ; Cayirci, Erdal
Author_Institution :
Comput. Networks Res. Lab., Bogazici Univ., Istanbul, Turkey
Abstract :
A novel handoff decision algorithm, namely multicriteria handoff decision algorithm (MDA), for the virtual cell layout based mobile subsystem of the next generation tactical communications systems is introduced. In this algorithm, handoff decision metrics are received signal strength measurements from the access points, soft capacities of the access points, and relative directions and speeds of the access points and the base transceivers. Soft capacity of an access point is affected by the interference in the environment. We use a fuzzy inference system to process these metrics. We compare our algorithm with the received signal strength based handoff decision algorithms. Our tests have shown that MDA with lowest membership value threshold achieves minimum number of handoffs, and MDA with highest membership value threshold achieves minimum call blocking rate (GoS), where the call blocking rate is still in an acceptable level in the former case and number of handoffs is in an acceptable level in the latter case.
Keywords :
cellular radio; channel capacity; fuzzy logic; inference mechanisms; military communication; military computing; transceivers; GoS; base transceivers; call blocking rate; computer aided exercises interacted tactical communications simulation; fuzzy inference system; fuzzy logic system; handoff decision metrics; membership value threshold; mobile subsystem; multicriteria handoff decision algorithm; received signal strength measurement; soft capacity; tactical communications systems; virtual cell layout; Artificial neural networks; Fuzzy logic; Fuzzy systems; Inference algorithms; Interference; Mobile communication; Next generation networking; Pattern recognition; Telecommunication traffic; Transceivers;
Conference_Titel :
MILCOM 2002. Proceedings
Print_ISBN :
0-7803-7625-0
DOI :
10.1109/MILCOM.2002.1180482