کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6875972 689609 2016 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Partial gathering of mobile agents in asynchronous unidirectional rings
ترجمه فارسی عنوان
جمع آوری جزئی از عوامل تلفن همراه در حلقه های یک طرفه ناهمزمان
کلمات کلیدی
سیستم توزیع شده، عامل موبایل، جمع آوری مشکل جمع آوری جزئی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نظریه محاسباتی و ریاضیات
چکیده انگلیسی
In this paper, we consider the partial gathering problem of mobile agents in asynchronous unidirectional rings equipped with whiteboards on nodes. The partial gathering problem is a new generalization of the total gathering problem. The partial gathering problem requires, for a given integer g, that each agent should move to a node and terminate so that at least g agents should meet at the same node. The requirement for the partial gathering problem is weaker than that for the (well-investigated) total gathering problem, and thus, we have interests in clarifying the difference on the move complexity between them. We propose three algorithms to solve the partial gathering problem. The first algorithm is deterministic but requires unique ID of each agent. This algorithm achieves the partial gathering in O(gn) total moves, where n is the number of nodes. The second algorithm is randomized and requires no unique ID of each agent (i.e., anonymous). This algorithm achieves the partial gathering in expected O(gn) total moves. The third algorithm is deterministic and requires no unique ID of each agent. For this case, we show that there exist initial configurations in which no algorithm can solve the problem and agents can achieve the partial gathering in O(kn) total moves for solvable initial configurations, where k is the number of agents. Note that the total gathering problem requires Ω(kn) total moves, while the partial gathering problem requires Ω(gn) total moves in each model. Hence, we show that the move complexity of the first and second algorithms is asymptotically optimal.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Theoretical Computer Science - Volume 617, 29 February 2016, Pages 1-11
نویسندگان
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