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2009 International Workshop on Satellite and Space Communications最新文献

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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
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
Developments towards an Interplanetary Internet 迈向星际互联网的发展
2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286360
P. Romano, P. Schrotter, O. Koudelka, M. Wittig
{"title":"Developments towards an Interplanetary Internet","authors":"P. Romano, P. Schrotter, O. Koudelka, M. Wittig","doi":"10.1109/IWSSC.2009.5286360","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286360","url":null,"abstract":"A major effort in current developments for future space missions is the improvement of communications capabilities. With increasing interest in space research and long-term exploration programs including a variety of both near Earth and deep space missions of the major space agencies, communications faces additional challenges. Next-generation communication systems must be able to cope with long-distance communication links, supporting disruption-tolerant networking (DTN), implementing efficient store-and-forward strategies for data download, and providing interoperability between missions. Therefore, innovative concepts for the creation of an Interplanetary Internet (IPN) are currently under investigation. The Interplanetary Internet Special Interest Group (IPNSIG) has already elaborated a suitable IPN network architecture and identified key research areas. Since the main challenges for IPN are efficient data transport strategies, current research activities are focused on the transport layer. However, in order to achieve these goals, improvements at all OSI layers are necessary. The presented paper deals with future developments required for the establishment of an Interplanetary Internet. After introducing an IPN network architecture proposed by [1], the suitability of terrestrial Internet and existing space communications standards for IPN is analyzed. Current protocol developments for IPN are introduced and compared with the previously investigated standards. Finally, future IPN developments are presented. This analysis focuses on all OSI layers, providing a set of recommendations for the improvement of existing technologies and proposing some innovative concepts and solutions.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"208 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":"123196524","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: 7
Satellite and terrestrial diversity reception performance in tropical regions 热带地区卫星和地面分集接收性能
2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286328
D. Skraparlis, V. Sakarellos, A. Panagopoulos, J. Kanellopoulos
{"title":"Satellite and terrestrial diversity reception performance in tropical regions","authors":"D. Skraparlis, V. Sakarellos, A. Panagopoulos, J. Kanellopoulos","doi":"10.1109/IWSSC.2009.5286328","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286328","url":null,"abstract":"A diversity reception scheme using satellite and terrestrial links is an effective technique to reduce the large fading margins in satellite communications operating under fading conditions. The increased demand for bandwidth has led to the employment of frequencies above 10 GHz, where the dominant fading mechanism is rain attenuation. Signal attenuation is aggravated in heavy rain climatic regions. As it has been experimentally verified, the long-term behaviour of rain attenuation induced on a microwave path in tropical regions is approximated by a gamma distribution. In this paper, the outage performance analysis of a satellite-terrestrial diversity reception system operating at frequencies above 10 GHz is presented, employing spatially correlated gamma fading channels. The receiver combines the satellite signal with the signal received by a terrestrial network using either the Maximal Ratio Combining or the Selection Combining techniques. Extended numerical results present the impact of various operational, geometrical and geographical parameters on the outage system performance.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"34 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":"127139164","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: 3
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
A quickly deployable platform for multi-user communications over satellite links 通过卫星链路进行多用户通信的快速部署平台
2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286321
R. Boreli, T. Iyer, Christoph Dwertmann, Golam Sarwar, F. Klok
{"title":"A quickly deployable platform for multi-user communications over satellite links","authors":"R. Boreli, T. Iyer, Christoph Dwertmann, Golam Sarwar, F. Klok","doi":"10.1109/IWSSC.2009.5286321","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286321","url":null,"abstract":"We describe the research outcomes and resulting implementation and validation of a prototype IP telephony and data acceleration system for satellite communications. The system has been designed as a quickly deployable solution for generic use with fixed or mobile satellite services on land or sea. It has been developed in NICTA within the Office in a Box project and is currently being commercialised in 7-ip. Our main research contribution is a TCP proxy for long delay links, based on a novel congestion control and scheduling algorithm which incorporates lossless data compression. Additional contribution is in proposing and developing a silence suppression enhancement to the Asterisk IP telephony gateway. We describe the system and software architecture and software modules which include the satellite modem controller for the management of Inmarsat broadband satellite services. The system has been tested on a number of satellite services including Inmarsat BGAN, IPSTAR and VSAT systems. We present results of validation testing for multi-user IP telephony and data services and show performance improvement compared to standard solutions.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"4 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":"126972566","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
Regular session 4 (room E) transport and quality of service I 常规会议4 (E室)运输和服务质量
2009 International Workshop on Satellite and Space Communications Pub Date : 2009-10-13 DOI: 10.1109/IWSSC.2009.5286355
C. Kissling
{"title":"Regular session 4 (room E) transport and quality of service I","authors":"C. Kissling","doi":"10.1109/IWSSC.2009.5286355","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286355","url":null,"abstract":"","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"29 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114136344","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
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
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
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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