Article type: LETTER
Subject area: Communication Theory and Signals
2013 Volume E96.A Issue 12 Pages
2740-2744
Published: December 01, 2013
Released on J-STAGE: December 01, 2013
In this letter, we present a novel interference-aware clustering scheme for cell broadcasting service. The proposed approach is based on a genetic algorithm for re-clustering. Using the genetic algorithm, the suggested method efficiently re-clusters the user nodes when the relays fail in receiving the cell broadcasting message from the base station. The simulation results exhibit that the proposed clustering scheme can maintain much higher capacity than the conventional clustering scheme in the cases of relay outage. The re-clustering method based on genetic algorithm also shows lower complexity than the re-clustering approach based on exhaustive search.
Article type: LETTER
Subject area: Intelligent Transport System
2013 Volume E96.A Issue 12 Pages
2745-2749
Published: December 01, 2013
Released on J-STAGE: December 01, 2013
Geomagnetic information is informative because it has the ability to detect information about orientation by way of a ubiquitous device. However, a magnetic disturbance easily influences geomagnetic information. The magnetic disturbance detection method is needed in order to use geomagnetic information. Firstly, in this paper, the availability of geomagnetic information in Japan is investigated by field measurement work. Then, a new magnetic disturbance detection method which is better than the conventional method is proposed. The basic function of the proposed method is tested in actual condition.