A Design and Performance Evaluation of Path Search by Simplification of Estimated Values based on Variable Heuristic

가변 휴리스틱 기반 추정치 간소화를 통한 경로탐색 기법의 설계 및 성능 평가

  • Published : 2006.11.30


The path search method in the telematics system should consider traffic flow of the roads as well as the shortest time because the optimal path with minimized travel time could be continuously changed by the traffic flow. The existing path search methods are not able to cope efficiently with the change of the traffic flow. The search method to use traffic information also needs more computation time than the existing shortest path search. In this paper, a method for efficiency improvement of path search is implemented and its performance is evaluated. The method employs the fixed grid for adjustable heuristic to traffic flow. Moreover, in order to simplify the computation of estimation values, it only adds graded decimal values instead of multiplication operation of floating point numbers with due regard to the gradient between a departure and a destination. The results obtained from the experiments show that it achieves the high accuracy and short execution time as well.


  1. http://en.wikipedia.org/wikiA%2A_search _algorithm
  2. H. Lu, B.C. Ooi, 'Spatial Indexing: Past and Future', IEEE Data Engineering Bulletin, Vol. 16, No. 3, pp 16-21, 1993
  3. William Stallings,'Data & Computer Communications, sixth Edition', Prentice Hall, Inc, 2001
  4. Sungwon Jung, Sakti Pramanik, 'An Efficient Path Computation Model for Hierarchically Structured Topographical Road Maps', TKDE, Vol. 14, No. 5, pp. 1029-1046, 2002
  5. 이현섭, 김진덕, '고정 그리드 기반 가변 휴리스틱을 이용한 최적경로 탐색', 한국해양정보통신학회 2005 추계 종합학술대회, Vol.9, No.2, pp.137-141, 2005
  6. 김진덕, '추정치 간소화에 의한 경로 탐색 기법의 효율 개선', 한국해양정보통신학회 2006 인공지능 및 지능정보시스템 학술대회, pp. 25-28, 2006
  7. http://drive.nate.com
  8. Chang Wook Ahn, R. S. Ramakrishnan, 'A Genetic Algorithm for Shortest Path Routing Problem and the Sizing of Populations', IEEE Transaction on Evolutionary Computation, Vol.6, pp. 566-579, 2002 https://doi.org/10.1109/TEVC.2002.804323