Satellite Network Performance Measurements Using Simulated Multi-User Internet Traffic (original) (raw)
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2003 Symposium on Applications and the Internet Workshops, 2003. Proceedings.
Since it started in 1995, the Asian Internet Interconnection Initiatives (AI3) project has grown into a large satellitebased research network in the Asia Pacific. All partner institutions are connected via the C-band or Ku-band channel of the JCSAT satellite. This paper will evaluate the performance of the AI3 testbed in terms of bandwidth consumption, traffic flows, and measurement with the introduction of Open Network Measurements Data Exchange (OpenMDE), a new concept in network measurement systems. OpenMDE will provide a basis for future implementation, and could be applied to specific approaches of certain AI3's network operation issues. Furthermore, this paper will show the evaluation of each partner's utilization of the AI3 connection with an analysis of whether the traffic is associated with research or is part of the commercial Internet. Also, it will provide measurement data that will determine weak points of the network, serving as basis for possible upgrades.
Internet-type protocol testing in a simulated small satellite environment
2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542)
The throughput results for file transfers using file sizes ranging from 1 Kbytes through 1 Mbytes using both the standard TCP/IP and SCPS protocol stacks over a PPP link are reported. Channel properties were simulated using a space channel simulator with a range of balanced and unbalanced link speeds and channel error rates. The throughput results will show the effects of link configuration and channel error rate on file transfer time. The host computer configuration options for the protocols are factored into the comparison. The throughput reporting shows the effects of header compression and selection of congestion algorithm upon the results. The TCP/IP ftp and SCPS-FP using VJ congestion control algorithm results give similar results and better results than SCPS-FP with the Vegas congestion control algorithm in these experiments. No noticeable delay effects were noted with links delays corresponding to GEO orbits with file transfers of 1 Mbytes. TABLE OF CONTENTS 1. INTRODUCTION 2. METHODS AND PROCEDURES 3. RESULTS AND DISCUSSIONS 4. CONCLUSIONS 5. ACKNOWLEDGEMENTS 6. REFERENCES We have developed a Space-to-Ground Link Simulator (SGLS) to provide the simulation capabilities to test both protocol suites ([2], [3], and [4]). During the testing, we discovered that the protocol suites have a number of options that affect the overall protocol performance more greatly than others. This report discusses the experiments performed to map out how the options affect the overall performance from the user's point of view. When possible, option performance on both suites of protocols will be compared in a fair a manner as possible.
Comparison of TCP Congestion Control Performance over a Satellite Network
Passive and Active Measurement, 2021
Satellite connections are critical for continuous network connectivity when disasters strike and for remote hosts that cannot use traditional wired, WiFi or mobile networking. While satellite Internet bitrates have increased, latency can still degrade TCP performance. Realistic assessment of TCP over satellites is lacking, typically done by simulation or emulation only, if at all. This paper presents experiments comparing four TCP congestion control algorithms-BBR, Cubic, Hybla and PCC-on a commercial satellite network. Analysis shows similar steady-state bitrates for all, but with significant differences in start-up throughputs and round-trip times caused by queuing of packets in flight. Power analysis combining throughput and latency shows that overall, PCC is the most powerful, due to relatively high throughputs and consistent, relatively low round-trip times, while for small downloads Hybla is the most powerful, due to fast throughput ramp-ups. BBR generally fares similarly to Cubic in both cases.
IP-level satellite link emulation with KauNet
2009 International Workshop on Satellite and Space Communications, 2009
Distributed applications and transport protocols communicating over a satellite link may react very strongly to conditions specific to that kind of link. Providing a evaluation framework to allow tests of real implementations of such software in that context is quite a challenging task. In this paper we demonstrate how the use of the general-purpose KauNet IP-level emulator combined with satellite-specific packet loss patterns can help by reproducing losses and delays experienced on a satellite link with a simple Ethernet LAN setup. Such a platform is an essential tool for developers performing continuous testing as they provide new features for e.g. video codecs or transport-level software like DCCP and its congestion control components.
IEEE Journal on Selected Areas in Communications, 2004
The elasticity of transmission control protocol (TCP) traffic complicates attempts to provide performance guarantees to TCP flows. The existence of different types of networks and environments on the connections' paths only aggravates this problem. In this paper, simulation is the primary means for investigating the specific problem in the context of bandwidth on demand (BoD) geostationary satellite networks. Proposed transport-layer options and mechanisms for TCP performance enhancement, studied in the single connection case or without taking into account the media access control (MAC)-shared nature of the satellite link, are evaluated within a BoD-aware satellite simulation environment. Available capabilities at MAC layer, enabling the provision of differentiated service to TCP flows, are demonstrated and the conditions under which they perform efficiently are investigated. The BoD scheduling algorithm and the policy regarding spare capacity distribution are two MAC-layer mechanisms that appear to be complementary in this context; the former is effective at high levels of traffic load, whereas the latter drives the differentiation at low traffic load. When coupled with transport layer mechanisms they can form distinct bearer services over the satellite network that increase the differentiation robustness against the TCP bias against connections with long round-trip times. We also explore the use of analytical, fixed-point methods to predict the performance at transport level and link level. The applicability of the approach is mainly limited by the lack of analytical models accounting for prioritization mechanisms at the MAC layer and the nonuniform distribution of traffic load among satellite terminals.
PILOT: A Methodology for Modeling the Performance of Packet Connections
Zenodo (CERN European Organization for Nuclear Research), 2023
Network Services automation requires predictable Quality of Service (QoS) performance, measured in terms of throughput, delay and jitter, to allow making proactive decisions. QoS is typically guaranteed by overprovisioning capacity dedicated to the packet connection, which increases costs for customers and network operators, especially when the traffic generated by the users and/or the virtual functions highly varies over the time. This paper presents the PILOT methodology for modeling the performance of packet connections during commissioning testing in terms of throughput, delay and jitter. PILOT runs in a sandbox domain and constructs a scenario where an efficient traffic flow simulation environment, based on the CURSA-SQ model, is used to generate large amounts of data for Machine Learning (ML) model training and validation. The simulation scenario is tuned using real measurements of the connection obtained from a set of active probes.
Developing aggregate traffic intensity model for performance evaluation of global satellite systems
2004 IEEE 59th Vehicular Technology Conference. VTC 2004-Spring (IEEE Cat. No.04CH37514), 2004
This paper is concerned with the development of an aggregate traffc intensity model suitable for the performance evaluation of the Intersatellite Link (ISL) network in global satellite systems, particularly applicable to support the dimensioning of satellite networks and for computer simulations of various procedures in the ISL network segment. The model consists of four modules considering global distribution of traffic sources and destinations, temporal variations of traffic sources' intensity, traffc flow patterns between regions and statistical behavior of aggregated traffic sources. To support universal utilization of the proposed aggregate traffic intensity model, the individual modules need to he efficiently integrated and implemented as a highly parameterized software tool.
A Simulation Study of QoS for TCP Over LEO Satellite Networks With Differentiated Services
Proceedings Opnetwork Conference, 2000
A number of satellite communication systems have been proposed using geosynchronous (GEO) satellites, medium earth orbit (MEO) and low earth orbit (LEO) constellations operating in the Ka-band and above. The next generation broadband satellite systems will use fast packet switching with onboard processing to provide full two-way services to and from earth stations. New services gaining momentum include mobile services and high data rate internet access carried over integrated satellite-fiber networks. ...