Mobile Web Services - Concepts, Prototype, and Traffic Performance Analysis
Authors: Gehlen, Guido
Department of Communication Networks (ComNets), Faculty 6, RWTH Aachen University
Contact: publications@comnets.rwth-aachen.de
Ph. D. Dissertation RWTH Aachen University, ABMT 55, p. 224, ISBN:3-86130-934-3,Wissenschaftsverlag Mainz, 2007.
Publication Date: Oct, 2007
On page(s):224
ISBN: 3-86130-934-3
Abstract The use of mobile services is continuously growing and the technological and economic potential is not yet tapped. After the introduction of data bearer services in cellular communication systems, the mobile Internet access has been enabled. The Information Technology (IT) and the telecommunication (TC) domains began to merge and are still merging. In the IT domain the impact of XML Web Services has increased during recent years, since the Extensible Markup Language (XML) has been enforced as a meta language for structured information and its representation. This thesis presents concepts to integrate XML Web Services with mobile communication systems. The use of these technologies on terminals and network elements is discussed and extensions as well as enhancements are proposed. Amongst other topics, the so far passive role of the terminals is reconsidered. Terminals are going to be more intelligent and are going to provide services to each other as well as to network elements. Thereby, push and P2P services are going to be enabled without great development effort. Furthermore, protocol adjustments on the transport layer are proposed, which will significantly enhance the performance of Mobile Web Services. The concepts presented are implemented as prototypes and used in several practical applications in order to evaluate the benefits of these technologies for different Mobile Web Services use cases. The IP Multimedia Subsystem (IMS) is used as an integration platform for Web Services in the TC infrastructure. On one hand, the Mobile Web Service middleware forms an additional level of abstraction for application developers, on the other hand the middleware adjusts to the characteristic of the mobile communication system. Besides an implementation of prototypes, the Mobile Web Service protocols are evaluated in terms of their traffic performance. The traffic performance evaluation focuses on the analysis of the delay experienced by the user in using the service. An analytical Mobile Web Service model is derived on the basis of an abstract mobile link layer model, an end-to-end transport layer model, and a session/service layer model, in order to predict the performance. The model is predominantly used to compare two transport layer protocol alternatives for Mobile Web Services. For this purpose a novel analytical modeling method has been developed that enables the derivation of delay distribution functions based on the error behavior of protocols and the delay distributions of the underlying protocol. It focuses on modeling short-lived data flows induced by Mobile Web Service applications. In general, the model presented can be used for the delay analysis of arbitrary protocols. Especially, the modeling method is applicable to Automatic Repeat Request (ARQ) protocols.
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Bibtex
@PHDTHESIS{DISS_Gehlen,
AUTHOR = {Gehlen, G.},
TITLE = {Mobile Web Services - Concepts, Prototype, and Traffic Performance
Analysis},
YEAR = {2007},
MONTH = {Oct},
VOLUME = {55},
PAGES = {224},
PUBLISHER = {Wissenschaftsverlag Mainz},
ADDRESS = {Lehrstuhl für Kommunikationsnetze, Aachen, Germany},
SCHOOL = {RWTH Aachen University},
SERIES = {ABMT},
EDITION = {1},
AFFILIATION = {Department of Communication Networks (ComNets), Faculty 6, RWTH Aachen University},
ISBN = {3-86130-934-3},
URL = {https://www.comnets.rwth-aachen.de}
}
Signature in CN-Library = {A 88}