政大機構典藏-National Chengchi University Institutional Repository(NCCUR):Item 140.119/25170

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題名:	An Analytical Model for Centralized Service Discovery Architecture in Wireless Networks
作者:	Wu Tian;郭更生
貢獻者:	IEEE
日期:	2006-09
上傳時間:	2009-01-14 17:09:00 (UTC+8)
摘要:	Service discovery (SD) has been a hot research topic for several years, while few efforts have been made in theoretical analyses. Only one paper concerned the modeling of the decentralized SD in Ad-hoc networks. However, the traffic load caused by broadcasting restricts the adoption of decentralized architectures across the Internet. The purpose of this paper is to propose an analytical model for the centralized SD architecture in wireless networks. The directory is modeled as an M/G/c/c queuing system, which evaluates the cache usage on the directory. Moreover, we study the periodic service announcements (SAs) of an individual service provider (SP) to derive the success rate and the produced network traffic. Particularly, we take into account the characteristics of radio links and nodes` movement. The numerical analyses show that the update interval influences the metrics incompatibly. Trade-off between the success rate and the overhead is the only way to optimize the system performance. We also observe that nodes` movement can only cause degradation in success rate. And, the degradation enlarges with the increasing update interval.
關聯:	Proc. of 2006 Fall IEEE Vehicular Technology Conference
資料類型:	conference
DOI 連結:	http://dx.doi.org/10.1109/VTCF.2006.593
DOI:	10.1109/VTCF.2006.593
顯示於類別:	[企業管理學系] 會議論文

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