An initiative for conformance ATM-networks relying on satellite-links

Mola, Luisa; Lizcano, P.J.; Meuret, P.; Wannman, H.; Agnelli, S.

doi:10.1049/cp:19950073

Cited by 2 publications

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“…The long propagation delay plus processing delay of satellite equipment and terminal equipment may impair the quality of some ATM applications such as interactive video and some protocols that deals with retransmission such as Go-back-N. in this regard, it is worthwhile mentioning that experiments with interactive video-telephony, using H.261 video encoding technique, showed that the coding/decoding processing time is greater than the satellite transmission delay, hence, the impact of satellite delay on such service is acceptable and can be considered insignificant. On the other hand, the problem of transmission delay is being addressed through a design implementing low orbit satellites (LOS) which is capable of producing near zero delay which meets or exceeds the fiber network[12] …”

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<title>VBR MPEG-2-encoded video over broadband networks</title>

Zahir

Alnuweiri

1997

Performance and Control of Network Systems

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The end-to-end quality of service (QoS) of a variable bit rate (VBR) MPEG-2 compressed video transported over an interconnected ATM satellite-cable-terrestrial network incorporates the impact of the characteristics of these three media as well as the specificity of the video encoding/decoding processes. In this paper, we present the impact of a selected set of the QoS parameters on a number of VBR IVIPEG-2 encoded video clips on each segment of such internetworking. The QoS parameters used in our simulation include cell transmission delay (CTD), cell delay varianc.e (CDV), cell misinsertion rate (CMR), and cell error ratio (CER). Also, we discuss and compare the quantified impact of bit error characteristics of satellite and fiber optics ATM systems. Objective and subjective results of our simulation show that the impact of the satellite segment on the MPEG-2 encoded video quality is comparable to that of the fiber optics system and to that generated from the VBR MPEG-2 video encoding/decoding process.

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confidence: 99%

<title>VBR MPEG-2-encoded video over broadband networks</title>

Zahir

Alnuweiri

1997

Performance and Control of Network Systems

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Satellite ATM networks: a survey

1997

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Satellite ATM networks have significant advantages over terrestrial ATM networks. Satellites provide unique advantages such as remote coverage with rapid deployment, distance insensitivity, bandwidth on demand, immunity to terrestrial disasters, and offering broadband links, Satellite ATM networks will play an important role in the rapidly evolving information infrastructure. However, there are several obstacles which need to be overcome so that satellite ATM networks can operate in full service. The objective of this survey is t o present the state of the art in satellite ATM networks and t o point out open research problems. synchronous transfer mode (ATM) is the switching A and multiplexing technique for B-ISDN (broadband integrated services for digital networks) and is widely accepted as the networking technology of the future. ATM technology offers users integration of voice, video, and data services, and the flexibility of accessing bandwidth on demand. O n the other hand, there is increasing recognition of the benefits and advantages of using satellite transmission systems which, in our opinion, will play a significant role in establishing the global information infrastructure. Furthermore, satellites can be the key component in both the communication infrastructure of developing countries and the multimedia communication and information superhighway of technically more advanced countries [l]. The growing interest in the interconnection of satellite and ATM networks is based on the following additional reasons: By using satellite, ATM services can b e provided over a wide geographical area, including remote, rural, urban, and inaccessible areas. Satellite communication systems have a global reach with very flexible bandwidth -o 11 -demand cap abilities. This s ignificant strength of satellite communications ideally matches t h e main characteristics of ATM networks which provide bandwidth-on-demand and multimedia services. Satellites offer flexibility in terms of network configuration and capacity allocation to different sites which use ATM networks in various geographical areas. Satellites provide broadcast and multipointto-multipoint capabilities as well as fast unpredictable which may result in maximum resource utilization.New users can easily be added to the system by simply installing the ATM stations at customer premises. As a result, possible network expansions will be a simple task. Satellites can act as a safety valve for optical fiber ATM networks. Fiber failure, or network congestion problems, can be recovered easily by routing traffic through a satellite channel on a demand basis. However, there are several obstacles which need to be overcome so that satellite ATM networks can operate in full network setup which can b e useful in deploying multipoint-to-multipoint cornmunication of ATM networks. Alternative channels can be provided for connections for which the bandwidth demands and traffic characteristics a r e Figure 1. Satellite ATMnetwork architecture. 30 0163-6804/97/$10.00 0 1997 IEEE IEE...

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An initiative for conformance ATM-networks relying on satellite-links

Cited by 2 publications

References 0 publications

<title>VBR MPEG-2-encoded video over broadband networks</title>

<title>VBR MPEG-2-encoded video over broadband networks</title>

Satellite ATM networks: a survey

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