PolyU IR
 

PolyU Institutional Repository >
Computing >
COMP Theses >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/3027

Title: A mobile middleware for quality of service adaptations
Authors: Chuang, Siu-nam
Subjects: Hong Kong Polytechnic University -- Dissertations
Wireless communication systems -- Quality control
Network performance (Telecommunication)
Middleware
Fuzzy expert systems
Mobile computing
Issue Date: 2009
Publisher: The Hong Kong Polytechnic University
Abstract: Computation and networking resources in mobile operating environments are much scarcer and more dynamic than in desktop operating environments. Mobile applications can use adaptive computing to optimize the quality-of-service (QoS) delivery based on dynamic contextual situations. Fuzzy control models have been successfully applied to various distributed network QoS management systems. However, existing models are either application-specific or limited to abstract modeling and simple conceptual scenarios that do not take into account the overall scalability of these models. Specifically, the large number of QoS parameters in a mobile operating environment causes the rule-explosion problem, in which an exponential increase in the number of rules correspondingly increases the demand for processing power to infer the rules. Hierarchical fuzzy systems were introduced to reduce the number of rules using hierarchical fuzzy control, in which correlated linguistic variables are hierarchically inferred and grouped into abstract linguistic variables. In this thesis, we propose a mobile QoS management framework that uses a hierarchical fuzzy control model to support a highly extensible and structured adaptation paradigm. The proposed framework integrates several levels of QoS abstractions derived from user-perceived requirements. It also maps these abstractions to appropriate QoS resources that drive the development of mobile services that mitigate the effects of varying mobile environments. This framework provides an optimal overall service by synergistically balancing the QoS requirements of users and applications with the dynamic allocation of resources and chaining of services. Our proposal is novel in that it looks at QoS from a holistic, systematic, and pragmatic perspective. This thesis demonstrates the flexibility and efficiency of our QoS management framework in adapting to different users, applications, and platforms operating in wireless environments that are characterized by dynamic and constrained resources.
Degree: Ph.D., Dept. of Computing, The Hong Kong Polytechnic University, 2009
Description: 135 leaves : ill. ; 31 cm.
PolyU Library Call No.: [THS] LG51 .H577P COMP 2009 Chuang
Rights: All rights reserved.
Type: Thesis
URI: http://hdl.handle.net/10397/3027
Appears in Collections:COMP Theses
PolyU Electronic Theses

Files in This Item:

File Description SizeFormat
b23744789_ir.pdfFor All Users (Non-printable) 2.34 MBAdobe PDFView/Open
b23744789_link.htmFor PolyU Users 162 BHTMLView/Open



Facebook Facebook del.icio.us del.icio.us LinkedIn LinkedIn


All items in the PolyU Institutional Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
No item in the PolyU IR may be reproduced for commercial or resale purposes.

 

© Pao Yue-kong Library, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
Powered by DSpace (Version 1.5.2)  © MIT and HP
Feedback | Privacy Policy Statement | Copyright & Restrictions - Feedback