Title :
Hierarchical optimization of microcellular call handoffs
Author :
Lim, B.L. ; Wong, Lawrence W C
Author_Institution :
Dept. of Electron. & Comput. Eng., Ngee Ann Polytech., Singapore
fDate :
3/1/1999 12:00:00 AM
Abstract :
In this paper, we present a novel hierarchical optimization handoff algorithm (HOHA) which has superior performance over the conventional one- and two-threshold handoff algorithms. Our proposed algorithm scans through layers of call handoff options and determines the best candidate based on a heuristic that synchronizes reciprocal handoffs in adjacent cells and maximizes the spare channel capacity in the destination cells. Computer simulation results show that under a unity normalized load condition, the HOHA achieves a gain of about 55% and 11% in the probability of handoff failure as compared to the one- and two-threshold handoff algorithms, respectively. In addition, the total effective load carried is also improved by about 13% and 4%, respectively
Keywords :
channel capacity; cochannel interference; microcellular radio; optimisation; probability; HOHA; adjacent cells; call handoff options; cochannel interference; computer simulation; destination cells; gain; handoff failure probability; hierarchical optimization handoff algorithm; microcellular call handoffs; performance; radio spectrum management; reciprocal handoffs synchronization; resource management; spare channel capacity; total effective load; unity normalized load condition; Bit error rate; Channel capacity; Communication channels; Computer simulation; Hierarchical systems; Interchannel interference; Iterative algorithms; Land mobile radio cellular systems; Microcell networks; Mobile communication;
Journal_Title :
Vehicular Technology, IEEE Transactions on
