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2009 International Workshop on Satellite and Space Communications最新文献

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Evaluation of TCP performance over emulated DVB-RCS scenario with multiple RCSTs 具有多个rcst的模拟DVB-RCS场景下TCP性能评估
2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286320
F. Belli, M. Luglio, C. Roseti, F. Zampognaro
{"title":"Evaluation of TCP performance over emulated DVB-RCS scenario with multiple RCSTs","authors":"F. Belli, M. Luglio, C. Roseti, F. Zampognaro","doi":"10.1109/IWSSC.2009.5286320","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286320","url":null,"abstract":"This paper analyses performance of competing TCP connections when running over different Return Channel Satellite Terminals (RCSTs) and competing for DVB-RCS return link bandwidth through DAMA mechanisms. A test campaign has been performed over a Linux-based satellite emulator supporting a multi-RCST configuration in a star-based architecture, with the main goal to evaluate TCP behavior in terms of both capacity utilization and fairness. In the proposed communication scenario, TCP performance relates on the joint effect of two nested control loops: TCP congestion/rate control loop and DAMA bandwidth assignment loop. Various TCP versions have been taken into account: Reno, Vegas, Westwood+, Hybla, Cubic and Noordwijk, a new TCP specifically designed for DVB-RCS point-to-point links. Rate Based Capacity Request (RBDC) has been selected as the access protocol.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115321829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Quasi-Cyclic Low-Density Parity-Check (QC-LDPC) codes for deep space and high data rate applications 准循环低密度奇偶校验(QC-LDPC)码用于深空和高数据速率应用
2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286377
N. Andreadou, F. Pavlidou, S. Papaharalabos, P. Mathiopoulos
{"title":"Quasi-Cyclic Low-Density Parity-Check (QC-LDPC) codes for deep space and high data rate applications","authors":"N. Andreadou, F. Pavlidou, S. Papaharalabos, P. Mathiopoulos","doi":"10.1109/IWSSC.2009.5286377","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286377","url":null,"abstract":"In this paper we investigate and compare the performance of a selected class of Low-Density Parity-Check (LDPC) codes, i.e. Quasi-Cyclic (QC) LDPC codes, against the currently used turbo codes for deep space and high data rate applications. This is useful in future updates of the channel code option used for such applications by the Consultative Committee for Space Data Systems (CCSDS). A wide range of different code rates is examined and the obtained Bit Error Rate (BER) performance versus the Bit Energy to Noise Spectral Density ratio (Eb/N0) is reported. Both low and high code rates are being studied, and specifically the 1/2, 1/3, 1/4 and 1/5 as well as the 2/3, 3/4 and 4/5 code rates are taken under consideration. The role of the iteration rounds in the decoding procedure of LDPC codes is also examined showing that QC-LDPC codes outperform the currently used CCSDS turbo codes. Another advantage of QC-LDPC codes is their simple encoding procedure, which reduces the encoding complexity. Since deep space applications are considered, the signals are transmitted over the Additive White Gaussian Noise (AWGN) channel, with the specific block size of 7136 bits.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114690751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
BoD algorithm for TCP and multimedia applications in a DVB-S2/RCS system 在DVB-S2/RCS系统中TCP和多媒体应用的BoD算法
2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286397
Armando García Berumen, M. Marot
{"title":"BoD algorithm for TCP and multimedia applications in a DVB-S2/RCS system","authors":"Armando García Berumen, M. Marot","doi":"10.1109/IWSSC.2009.5286397","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286397","url":null,"abstract":"With the increasing utilization of multimedia applications and triple play services, multimedia traffic (using TFRC-TCP Friendly Rate Protocol) will be occupying an important portion of Internet in competition with TCP traffic. However, the increasing occupation will be accompanied by complex user's bandwidth requests. In satellite based systems such as DVB-S2/RCS, the management of this resource will be critical. In this work we propose a Bandwidth on Demand (BoD) algorithm based on a cross-layer interaction between the MAC and Transport layers to overcome the BW optimization problem. The algorithm allows to recover the bandwidth that is not being used for any other connection assigning it to the connections that require more resources.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130789663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Special session 3 (room 18) security 特别会议3(18室)安全
2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286411
P. Pillai, H. Cruickshank
{"title":"Special session 3 (room 18) security","authors":"P. Pillai, H. Cruickshank","doi":"10.1109/IWSSC.2009.5286411","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286411","url":null,"abstract":"","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128777566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Special session 2 (room E) ISICOM: the research challenges for the European SatCom 特别会议2 (E室)ISICOM:欧洲卫星通信面临的研究挑战
2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286418
J. Seseña
{"title":"Special session 2 (room E) ISICOM: the research challenges for the European SatCom","authors":"J. Seseña","doi":"10.1109/IWSSC.2009.5286418","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286418","url":null,"abstract":"","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123896371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rate-compatible punctured DVB-S2 LDPC codes for DVB-SH applications 速率兼容的穿孔DVB-S2 LDPC码用于DVB-SH应用
2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286434
M. Smolnikar, T. Javornik, M. Mohorčič, S. Papaharalabos, P. Mathiopoulos
{"title":"Rate-compatible punctured DVB-S2 LDPC codes for DVB-SH applications","authors":"M. Smolnikar, T. Javornik, M. Mohorčič, S. Papaharalabos, P. Mathiopoulos","doi":"10.1109/IWSSC.2009.5286434","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286434","url":null,"abstract":"In this paper, we present and analyze three padding and puncturing schemes for DVB-S2 low-density parity-check (LDPC) codes, in order to obtain coding rates equivalent to DVB-SH specification (2/3, 1/2, 2/5, 1/3, 2/7, 1/4, 2/9 and 1/5). We compare the performance of punctured DVB-S2 LDPC codes against the 3GPP2 turbo codes. Simulation results for bit error rate (BER) and frame error rate (FER) show that the proposed coding schemes exhibit 0.5 dB to 0.75 dB penalty loss compared to 3GPP2 codes. The codes with random and deliberate puncturing show nearly the same performance in AWGN channel, while the optimal puncturing shows 0.2 dB better performance.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131120129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
Limitation of Performance Enhancement Proxy with specialized oil and gas applications 专用油气增产代理的局限性
2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286342
Fawaz A. Farooqui
{"title":"Limitation of Performance Enhancement Proxy with specialized oil and gas applications","authors":"Fawaz A. Farooqui","doi":"10.1109/IWSSC.2009.5286342","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286342","url":null,"abstract":"Although Performance Enhancement Proxy (PEP) has been proven to be an effective solution to address TCP's performance issues over satellite links, it has some limitations in terms of memory that may be a serious problem in cases where a large number of TCP sessions need to be maintained between endpoints. We experienced one of these cases in Saudi Aramco where drilling web-based applications were establishing, maintaining, and closing large numbers of TCP sessions. The applications, possibly due to PEP's failure to hold TCP's end-to-end semantics, were not terminating sessions in a CLOSE_WAIT state. Further, large numbers of terminated sessions were transitioning to TIME_WAIT states. Both session types were staying active long enough to cause the PEP translation table to reach its limit of 500 concurrent sessions and deny any new TCP connections. To address this issue, modifications to our remote terminal PEPs were required to clear these sessions based on timeouts.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122881414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Multicast architecture for PIM-SM in broadband satellite multimedia systems 宽带卫星多媒体系统中PIM-SM的组播结构
2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286422
R. Mort, H. Cruickshank
{"title":"Multicast architecture for PIM-SM in broadband satellite multimedia systems","authors":"R. Mort, H. Cruickshank","doi":"10.1109/IWSSC.2009.5286422","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286422","url":null,"abstract":"The approach currently being taken by ETSI (BSM) to standardisation for Multicast PIM-SM protocols is described. This paper describes methods, architectures and adaptations to support IP-multicast services efficiently across IP-based broadband multimedia satellite systems. The final objective is to arrive at a consensus for a standard on this subject.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129529605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Data collection and SCADA over GEO-MSS satellites using Spread SCMA 利用Spread SCMA在GEO-MSS卫星上进行数据收集和SCADA
2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286301
R. Fang, M. Eroz, N. Becker
{"title":"Data collection and SCADA over GEO-MSS satellites using Spread SCMA","authors":"R. Fang, M. Eroz, N. Becker","doi":"10.1109/IWSSC.2009.5286301","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286301","url":null,"abstract":"With the deployment of high EIRP and high G/T L-and/ or S- band geo-synchronous mobile satellites such as TerreStar, ICO, and SkyTerra, low power and long battery-life user terminals (UTs) can be employed to provide data collection and supervisory control and data acquisition (SCADA) services. These services are typically of low data rate, low duty factor, and geographically dispersed, using unattended and battery operated UTs, which must be low cost and have long battery life. This paper presents a unique Spread Scrambled Coded Multiple Access (SSCMA) scheme to achieve the low-cost and long battery-life objectives. This scheme employs low-rate forward error correction (FEC) coding and spectral spreading to achieve a power efficiency better than CDMA over a given BW without requiring complicated power control. System design, UT characteristics, and transmission performance will be presented.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122184383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Cross-layer optimization of hybrid satellite network over the Amazonian region 亚马逊地区混合卫星网络的跨层优化
2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286327
J. Radzik, O. Vidal, D. Pradas, M. Vazquez Castro
{"title":"Cross-layer optimization of hybrid satellite network over the Amazonian region","authors":"J. Radzik, O. Vidal, D. Pradas, M. Vazquez Castro","doi":"10.1109/IWSSC.2009.5286327","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286327","url":null,"abstract":"Tabatinga is a SATNEX initiative aimed at defining and designing a DVB-S2/RCS WiMAX system to provide access network services over the Amazonian region of Brazil at Ku band. This paper summarizes the work done on the higher layer aspects, network architecture and access performance of the system.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122680663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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