GIS Web Service Using Context Information in Mobile Environments

2006 ◽  
pp. 895-903 ◽  
Author(s):  
Xun Li ◽  
Woochul Shin ◽  
Li Li ◽  
Sang Bong Yoo
Keyword(s):  
Web Service ◽  
Context Information ◽  
Mobile Environments

Migrating Web Services in Mobile and Wireless Environments

2011 ◽  
pp. 706-723
Author(s):  
Myung-Woo Park ◽  
Yeon-Seok Kim ◽  
Kyong-Ho Lee
Keyword(s):  
Web Services ◽  
Web Service ◽  
Mobile Devices ◽  
Wireless Network ◽  
Efficient Method ◽  
Source Code ◽  
Context Information ◽  
Wireless Environments ◽  
Migration Method ◽  
The Web

Mobile devices enabled with Web services are being considered as equal participants of the Web services environment. The frequent mobility of devices and the intermittent disconnection of wireless network require migrating or replicating Web services onto adjacent devices appropriately. This article proposes an efficient method for migrating and replicating Web services among mobile devices through code splitting. Specifically, the proposed method splits the source code of a Web service into subcodes based on users’ preferences for its constituent operations. The subcode with a higher preference is migrated earlier than others. The proposed method also replicates a Web service to other devices to enhance its performance by considering context information such as network traffic or the parameter size of its operations. To evaluate the performance of the proposed method, the effect of the code splitting on migration was analyzed. Furthermore, to show the feasibility of the proposed migration method, three application scenarios were devised and implemented.

Towards Adaptive Security for Ubiquitous Computing Systems

2011 ◽  
pp. 574-584
Author(s):  
Volkmar Lotz ◽  
Luca Compagna ◽  
Konrad Wrona
Keyword(s):  
Sensor Networks ◽  
Ubiquitous Computing ◽  
Context Information ◽  
Strong Impact ◽  
Adaptive Security ◽  
Mobile Environments ◽  
Computing Systems ◽  
Security Services ◽  
On Demand ◽  
Constant Change

The flexibility and dynamism of ubiquitous computing systems have a strong impact on the way their security can be achieved, reaching beyond traditional security paradigms like perimeter security and communication channel protection. Constant change of both the system and its environment demand adaptive security architectures, capable of reacting to events, evaluating threat exposure, and taking evolving protection needs into account. We introduce two examples of projects that contribute to meeting the challenges on adaptive security. The first focuses on an architecture that allows for adaptive security in mobile environments based on security services whose adaptation is guided by context information derived from sensor networks. The second addresses engineering aspects of secure ubiquitous computing systems through making security solutions accessible and deployable on demand and following emerging application-level requirements.

A web service approach for providing context information to CSCW applications

2004 ◽  
Author(s):  
R.B. Neto ◽  
C. Jardim ◽  
J. Camacho-Guerrero ◽  
M. da Graca Pimentel
Keyword(s):  
Web Service ◽  
Context Information

Towards Adaptive Security for Ubiquitous Computing Systems

2009 ◽  
pp. 2424-2434
Author(s):  
Volkmar Lotz ◽  
Luca Compagna ◽  
Konrad Wrona
Keyword(s):  
Sensor Networks ◽  
Ubiquitous Computing ◽  
Context Information ◽  
Strong Impact ◽  
Adaptive Security ◽  
Mobile Environments ◽  
Computing Systems ◽  
Security Services ◽  
On Demand ◽  
Constant Change

The flexibility and dynamism of ubiquitous computing systems have a strong impact on the way their security can be achieved, reaching beyond traditional security paradigms like perimeter security and communication channel protection. Constant change of both the system and its environment demand adaptive security architectures, capable of reacting to events, evaluating threat exposure, and taking evolving protection needs into account. We introduce two examples of projects that contribute to meeting the challenges on adaptive security. The first focuses on an architecture that allows for adaptive security in mobile environments based on security services whose adaptation is guided by context information derived from sensor networks. The second addresses engineering aspects of secure ubiquitous computing systems through making security solutions accessible and deployable on demand and following emerging application-level requirements.

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