Architectures for the INTELSAT NISDN‐compatible satellite communications network

Chitre, D. M.; Oei, W. S.

doi:10.1002/sat.4600100505

Cited by 4 publications

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The role of satellite communication in the ISDN era

Chitre

1992

Int. J. Satell. Commun.

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Satellite communications can play an important role in provisioning the next-generation telecommunications services and networks, provided that the protocols specifying these services and networks are satellite-compatible. After a brief discussion of narrowband circuit and packet mode integrated service digital network (ISDN) services, the paper focuses on emerging standards in frame relay, broadband ISDN (BISDN) and universal personal telecommunications (UPT). The specific parameters and procedures of frame relay and BISDN protocols which are affected by a satellite delay are identified, and congestion and resource management functions for frame relay and BISDN are discussed in detail. Specific ground functions and possible on-board functions are identified as potential candidates for implementation via neural network technology. Finally, the implication of UFT standards on satellite networks is discussed.

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The role of satellite communication in the ISDN era

Chitre

1992

Int. J. Satell. Commun.

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On‐board closed‐loop congestion control for satellite‐based packet‐switching networks

Chu

Ivancic

Kim

1994

Int. J. Satell. Commun.

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NASA Lewis Research Center is currently investigating a satellite architecture that incorporates an on‐board packet‐switching capability. Because of the statistical nature of packet switching, arrival traffic may fluctuate, and thus it is necessary to integrate the congestion control mechanism as part of the on‐board processing unit. This study focuses on the closed‐loop reactive control. We investigate the impact of the long propagation delay on the performance, and propose a scheme to overcome the problem. The scheme uses a global feedback signal to regulate the packet arrival rate of the ground stations. In this scheme, the satellite continuously broadcasts the status of its output buffer and the ground stations respond by selectively discarding packets or by tagging the excessive packets as low‐priority. The two methods are evaluated by theoretical queueing analysis and simulation. The former is used to analyse the simplified model and to determine the basic trends and bounds, and the latter is used to assess the performance of a more realistic system and to evaluate the effectiveness of more sophisticated control schemes. The results show that the long propagation delay makes the closed‐loop congestion control less responsive. The broadcast information can only be used to extract statistical information. The discarding method needs carefully‐chosen status information and a reduction function, and normally requires a significant amount of ground discarding to reduce the on‐board packet loss probability. The tagging method is more effective since it tolerates more uncertainties and allows a larger margin of error in status information. It can protect the high‐priority packets from excessive loss and fully use the down‐link bandwidth at the same time.

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Chu

1997

Telecommunication Systems

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Architectures for the INTELSAT NISDN‐compatible satellite communications network

Cited by 4 publications

References 0 publications

The role of satellite communication in the ISDN era

The role of satellite communication in the ISDN era

On‐board closed‐loop congestion control for satellite‐based packet‐switching networks

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