Browsing by Author "Chou, WK"

Now showing 1 - 2 of 2

Performance and cost analysis of mobile Internet multicast protocols
(1997)
Chi, KH
;
Tseng, CC
;
Chou, WK
;
資訊工程學系
;
Department of Computer Science
This paper presents performance analysis of two general approaches to IP multicasting in mobile environments. In the first approach, copies of each multicast datagram were forwarded to Mobility Agents in. all wireless LANs on a campus. The other approach designated the Mobility Agent as a proxy (fixed host) for its local mobile hosts to participate in communication group, thus allowing current multicast protocols on the wired backbone to be easily applied. We develop an analytical model for quantifying their performance metrics. Performance is measured in terms of the latency required for group members, fixed and mobile hosts, to receive a datagram addressed to them, network bandwidth required to accomplish a single multicast. Numerical results show that each approach can outperform the other in certain circumstances.
Petri net-based analysis on object assignment in distributed object-oriented systems
(1998-09-01)
Chang, WT
;
Tseng, CC
;
Chou, WK
;
資訊工程學系
;
Department of Computer Science
Object-oriented programming [9], which treats objects as processes in execution, has shown significant effectiveness in distributed systems. This effectiveness is greatly influenced by how objects are assigned to nodes. In this paper, we present a colored generalized stochastic Petri net (CGSPN) model to analyze the behavior of object invocations when an assignment strategy is applied. The effectiveness of an object assignment is also analyzed by our CGSPN model. Moreover, this analysis provides guidelines to develop an efficient object assignment strategy. [4-8].