TY - GEN

T1 - On-line navigation in a room

AU - Bar-Eli, E.

AU - Berman, Piotr

AU - Fiat, A.

AU - Yan, Peiyuan

PY - 1992/9/1

Y1 - 1992/9/1

N2 - We consider the problem of navigating through an unknown environment in which the obstacles are disjoint oriented rectangles enclosed in an n × n square room. The task of a navigating algorithm is to reach the center of the room starting from one of the corners. While there always exists a path of length n, the best previously known navigating algorithm finds paths of length n2O(√in n). We give an efficient deterministic algorithm which finds a path of length O(n In n); this algorithm uses tactile information only. Moreover, we prove that any deterministic algorithm can be forced to traverse a distance of Ω(n In n), even if it uses visual information.

AB - We consider the problem of navigating through an unknown environment in which the obstacles are disjoint oriented rectangles enclosed in an n × n square room. The task of a navigating algorithm is to reach the center of the room starting from one of the corners. While there always exists a path of length n, the best previously known navigating algorithm finds paths of length n2O(√in n). We give an efficient deterministic algorithm which finds a path of length O(n In n); this algorithm uses tactile information only. Moreover, we prove that any deterministic algorithm can be forced to traverse a distance of Ω(n In n), even if it uses visual information.

UR - http://www.scopus.com/inward/record.url?scp=84923094397&partnerID=8YFLogxK

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AN - SCOPUS:84923094397

T3 - Proceedings of the Annual ACM-SIAM Symposium on Discrete Algorithms

SP - 237

EP - 249

BT - Proceedings of the 3rd Annual ACM-SIAM Symposium on Discrete Algorithms. SODA 1992

PB - Association for Computing Machinery

T2 - 3rd Annual ACM-SIAM Symposium on Discrete Algorithms. SODA 1992

Y2 - 27 January 1992 through 29 January 1992

ER -