• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.8 no.2
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• pp.137-148
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• 2009

Recently, as technology for obtaining locational awareness and wireless telecommunications improve, technologies and services involving Telematics has grown rapidly. However, the services are currently available on certain terminals selected by the telematics service provider (TSP). This means in order to access services provided by other TSPs, it is necessary to purchase related terminals. To solve this problem, it is essential to achieve service interoperability between TSPs, or between TSPs and the contents provider (CP). Under this backdrop, the aim of this paper is to design and implement a telematics service framework for openning services in a heterogeneous network environment. Futhermore, the paper presents open telematics protocols required for communication in the telematics service framework, and develop technologies to deal with this in different network environments.

• ETRI Journal
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• v.33 no.3
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• pp.355-365
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• 2011

IPTV broadcast channels and video content distribution are increasingly saturating network paths. New solutions based on inter-domain multicast protocols could contribute to the enhancement of multimedia content distribution over the Internet. The aim of this paper is to propose new capabilities for an existing inter-domain multicast protocol, the Protocol Independent Multicast-Sparse Mode. We describe the modified protocol and analyze its behavior using newly developed tools based on an open-source software simulator. The resulting protocol does not require topology information, which is advantageous for easier deployment. In addition, the adopted solution avoids inherent problems with inter-domain multicast routing, such as multiple paths and path asymmetries.