Advanced Performance Enhancing Mechanisms for Supporting Real-Time Services on DVB-RCS System Environments

Nam-Kyung LEE  Soo-Hoan CHAE  Deock-Gil OH  Ho-Jin LEE  

IEICE TRANSACTIONS on Communications   Vol.E88-B   No.7   pp.2777-2783
Publication Date: 2005/07/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.7.2777
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Mobile Multimedia Communications)
DVB-RCS,  PEP,  user-level real-time scheduler,  two-way satellite,  QoS,  

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This paper describes two way satellite system environments on geostationary orbit (GEO) and performance enhancement mechanisms which reduces round trip time (RTT) and supports real-time services. We use performance enhancing proxy (PEP) for reducing round trip time and user-level real-time scheduler for reducing deadline violation tasks. The user-level real-time scheduling method classifies priority of user process into four types and those are reflected in kernel. With these dual performance enhancement mechanisms, we can improve quality of service (QoS) of end-user who connects to the DVB-RCS system.