Two-Way Internet Over iPSTAR Using Advanced Error Correction and Dynamic Links

Thesling, William; Vanderaar, Mark; Thompson, Mark; Hamilton, Peter; Panuwattanawong, Paiboon; Gedney, R. T.

doi:10.2514/6.2002-1944

Cited by 6 publications

(9 citation statements)

References 1 publication

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“…The satellite service can have both congestion and errors on the link, although the congestion experienced in long-term experiments is low. The network RTT characterised during our long-term experiments show, for large packet sizes, an average RTT of greater than 1 s. Published results indicate an operating BER of 10 À 7 [27].…”

Section: Methodssupporting

confidence: 52%

“…The sender side observations were included to highlight the regularity of the VoIP traffic, and to confirm the expected timing of packets as per Table , although we note that the Asterisk PBX software occasionally introduces incorrect timing in the sender VoIP stream. The receiver side jitter is significantly higher, as the IPSTAR satellite link sends data in bursts . Our observations show that the main source of jitter is the network rather than the DCCP congestion control algorithm, that is the average and maximum jitter values do not significantly differ between DCCP and UDP experiments.…”

Section: Initial Test Results and Performance Analysismentioning

confidence: 70%

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On the quality of VoIP with DCCP for satellite communications

Sarwar

Boreli

Lochin

2012

Satell Commun Network

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SUMMARY We present experimental results for the performance of selected voice codecs using Datagram Congestion Control Protocol (DCCP) with CCID4 congestion control over a satellite link. We evaluate the performance of both constant and variable data rate speech codecs for a number of simultaneous calls using the ITU E‐model. We analyse the sources of packet losses and additionally analyse the effect of jitter, which is one of the crucial parameters contributing to Voice over IP (VoIP) quality and has, to the best of our knowledge, not been considered previously in the published DCCP performance results. We propose modifications to the CCID4 algorithm and demonstrate how these improve the VoIP performance, without the need for additional link information other than what is already monitored by CCID4. We also demonstrate the fairness of the proposed modifications to other flows. Although the recently adopted changes to TCP‐Friendly Rate Control specification alleviate some of the performance issues for VoIP on satellite links, we argue that the characteristics of commercial satellite links necessitate consideration of further improvements. We identify the additional benefit of DCCP when used in VoIP admission control mechanisms and draw conclusions about the advantages and disadvantages of the proposed DCCP/CCID4 congestion control mechanism for use with VoIP applications. Copyright © 2012 John Wiley & Sons, Ltd.

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Section: Methodssupporting

confidence: 52%

Section: Initial Test Results and Performance Analysismentioning

confidence: 70%

On the quality of VoIP with DCCP for satellite communications

Sarwar

Boreli

Lochin

2012

Satell Commun Network

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“…The network RTT characterised during our long term experiments show, for large packet sizes, an average RTT of greater than 1sec. Published results indicate an operating bit error rate (BER) of 10 −7 [16].…”

Section: A Characteristics Of Satellite Linksmentioning

confidence: 97%

DART: Enhancing Data Acceleration with Compression for Satellite Links

Iyer

Boreli

Sarwar

et al. 2009

GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference

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We present Data acceleration and reduction technology (DART), a new rate based congestion control and scheduling mechanism with integrated data compression. DART has been implemented in the 7-ip satellite gateway products and is based on SCPS-TP framework. We evaluate the performance of this scheme on two live commercially available satellite systems, IPSTAR and Inmarsat BGAN and compare it to the performance of a number of TCP flavors previously proposed for use on satellite links. We show that on congested satellite links the proposed scheme outperforms the established techniques. We additionally highlight the benefits of data compression when fully integrated within the transport protocol. Finally, we demonstrate fairness of the proposed scheme to other flows.

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“…Communications between Receiver 1 and Receiver 2 are relayed via the local gateways, to the Headquarters, which was 862 km away from both rescue sites. All inter-team communications was done via the satellite Shinsat iPStar which is modelled according to [1], while the intra-team communications were modelled as per Scenario A. For the satellite link in the simulation model, we assumed the satellite channel is 512 kbps, with a one-way propagation delay of 270ms which is that of a geostationary satellite link [2].…”

Section: Testbed Architecturementioning

confidence: 99%

“…The advantage of satellite communications over radio communications is that satellite can support digital packet-based data transmitted at broadband speeds (typically up to 4.1 Mbps for return link and 12 Mbps for forward link [1]). Furthermore, the broadband connection allows for large amounts of multimedia data transmissions.…”

Section: Introductionmentioning

confidence: 99%

Communications Support for Disaster Recovery Operations using Hybrid Mobile Ad-Hoc Networks

Shi

Yang

Niemegeers

2007

32nd IEEE Conference on Local Computer Networks (LCN 2007)

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During times of calamity, such as an earthquake or tsunami, rescue and recovery efforts are usually hampered by communications failure as the incumbent communications infrastructure has most likely been damaged or destroyed during the disaster. An ad-hoc communications infrastructure, with support for multimedia traffic such as Voice over IP and videostreaming, must be quickly put in place to support the command, control and communication needs of the rescue and recovery operations. Such applications require relatively fast and robust communications links, and broadband wireless technologies appear to be a viable solution. This paper examines two hierarchical network solutions which allow the delivery of such mission-critical multimedia data between rescue teams and their headquarters over extremely long distances using a combination of wireless network technologies (namely, WiFi, WiMax and GEO Satellite) and multimedia software applications (in particular, Voice-over-IP) to meet the requirements of disaster rescue communication scenarios. The proposed system has been validated experimentally in the field as well as using simulations to demonstrate the scalability of the design.Keywords-ad hoc networks, wireless broadband networks, multimedia communications, disaster recovery.

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Two-Way Internet Over iPSTAR Using Advanced Error Correction and Dynamic Links

Cited by 6 publications

References 1 publication

On the quality of VoIP with DCCP for satellite communications

On the quality of VoIP with DCCP for satellite communications

DART: Enhancing Data Acceleration with Compression for Satellite Links

Communications Support for Disaster Recovery Operations using Hybrid Mobile Ad-Hoc Networks

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