Na Taol, Michel Bousquet2, Alain Pirovanol, Jose Radzik2
{"title":"DVB-S2/DVB-RCS satellite system performance assessment for IFE and ATN aeronautical communications","authors":"Na Taol, Michel Bousquet2, Alain Pirovanol, Jose Radzik2","doi":"10.1109/IWSSC.2006.256017","DOIUrl":"https://doi.org/10.1109/IWSSC.2006.256017","url":null,"abstract":"Two concurrent satellite systems are presently proposed for in-flight entertainment (IFE) communications, thus demonstrating the capability of satellites to provide multimedia access to users on board airplanes. At the same time, an increasing interest for the use of satellite communications for air traffic control has been motivated by the increasing load of traditional radio links, mainly in the VHF band. However, the development of a dedicated satellite system for ATC (air traffic control) and ATN (aeronautical telecommunication network) seems to be a long-term perspective. The objective of the presented system design is to provide both passenger application traffic (Internet, GSM) access and a high-reliability channel for aeronautical applications using the same satellite links. Due to the constraints in capacity and radio bandwidth allocation, very high frequencies (above 20 GHz) are considered here. The corresponding design implications for the air interface are taken into account and access performances are derived using a dedicated simulation model. Some preliminary results are shown in this paper to demonstrate the technical feasibility of such system design with increased capacity, more details and the open issues will be studied in the future of the thesis research","PeriodicalId":335831,"journal":{"name":"2006 International Workshop on Satellite and Space Communications","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124856306","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}
{"title":"Land Mobile Propagation Fade Duration Modelling by Markov Chains","authors":"L. Csurgai-Horváth, J. Bitó","doi":"10.1109/IWSSC.2006.256034","DOIUrl":"https://doi.org/10.1109/IWSSC.2006.256034","url":null,"abstract":"Fade duration is one of the most important dynamic aspects of path attenuation that corresponds to the time length during which a fixed threshold is exceeded by path attenuation. Precise estimation of the fade duration parameter is essential to be taken into account in wireless communication system design for several reasons like calculating the system outage or unavailability period, sharing the system resource during the events, apply fade mitigation techniques, select the right coding scheme etc. In this paper we are presenting a digital model with N-state partitioned Markov chain for the statistical prediction of the fade duration at different attenuation thresholds. The parameter set of the digital model has been derived from the fade duration statistics of a land mobile satellite link measurement at 1.54 GHz. The parameterizations of this model includes beside the fade events also the interfade periods, therefore leads to a more precise fade duration model and provide the possibility of the implementation of joint fade-interfade duration modelling. The threshold dependence of the Markov chain's stochastic matrix elements are determined by an empirical equation","PeriodicalId":335831,"journal":{"name":"2006 International Workshop on Satellite and Space Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128912883","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}
{"title":"TFMCC Protocol Behaviour in Satellite Multicast with Variable Return Path Delays","authors":"C. Kulatunga, G. Fairhurst","doi":"10.1109/IWSSC.2006.256037","DOIUrl":"https://doi.org/10.1109/IWSSC.2006.256037","url":null,"abstract":"This paper investigates the performance of TCP-friendly multicast congestion control (TFMCC) protocol in satellite networks. TFMCC is a sender-driven congestion control protocol that extends the TFRC congestion control mechanism into multicast. To provide receiver feedback, the TFMCC protocol requires two-way communication like in DVB-RCS that allows a return path over the satellite link to the sender. The adverse effects due to large and varying DVB-RCS delay in slow-start, throughput and congestion response time are analyzed with simulations. It also provides protocol adaptations to improve congestion response using early identification of the leading receiver and dynamic group size determination","PeriodicalId":335831,"journal":{"name":"2006 International Workshop on Satellite and Space Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131949494","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}
C. Morlet, A. Alamañac, G. Gallinaro, L. Erup, P. Takats, A. Ginesi
{"title":"Introduction of Mobility Aspects for DVB-S2/RCS Broadband Systems","authors":"C. Morlet, A. Alamañac, G. Gallinaro, L. Erup, P. Takats, A. Ginesi","doi":"10.1109/IWSSC.2006.255999","DOIUrl":"https://doi.org/10.1109/IWSSC.2006.255999","url":null,"abstract":"In this paper we address the emerging application of mobility to DVB-RCS systems. After the introduction of the commercially viable system scenarios and the different market segments, the technical issues concerning both the forward and the return link of the RCS mobile system are discussed. Possible techniques to cope with such challenges are presented together with their potential impact to the standard","PeriodicalId":335831,"journal":{"name":"2006 International Workshop on Satellite and Space Communications","volume":"19 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130934599","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}
M. Flohberger, W. Kogler, W. Gappmair, O. Koudelka
{"title":"Symbol Rate Estimation with Inverse Fourier Transforms","authors":"M. Flohberger, W. Kogler, W. Gappmair, O. Koudelka","doi":"10.1109/IWSSC.2006.256003","DOIUrl":"https://doi.org/10.1109/IWSSC.2006.256003","url":null,"abstract":"A two-stage algorithm for blind symbol rate estimation is introduced, which applies to any linear modulation scheme. In the first stage, the inverse Fourier transform of the averaged power spectrum is used to extract a coarse estimate based on the evaluation of the related baseband shape. The accuracy of the result can be improved considerably if the accumulated timing error of the subsequent symbol synchronizer is assessed appropriately and fed back to the resampling unit for further refinement. The performance of the proposed algorithm is verified by simulations and compared to methods published in the open literature","PeriodicalId":335831,"journal":{"name":"2006 International Workshop on Satellite and Space Communications","volume":"151 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123059714","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}
{"title":"Depolarization Mitigation using Frequency Offset in the Dual-Polarized X-Band for EESS","authors":"Sang Gyu Lee, S. Ra, Song Jae Lee","doi":"10.1109/IWSSC.2006.255983","DOIUrl":"https://doi.org/10.1109/IWSSC.2006.255983","url":null,"abstract":"Dual-polarization frequency reuse technique has been actively adopted in space-to-earth links for earth exploration satellite service (EESS) to meet growing demands on high rate data transmission over the restrictedly allocated bandwidth in X-band. However, the performance of the dual-polarization system is affected by depolarization due to tropospheric propagation impairments such as rain drops and ice particles. In this paper, we investigate the offset scheme as an approach to mitigate the depolarization that always exists inherently in the dual-polarized satellite system. We present numerical formulas to estimate the depolarization effects as a function of the offset frequency, using theoretically derived CPA and XPD, in dual-polarized X-band down link channels for EESS. In addition, we present an example of link budget evaluated by using the calculated parameters","PeriodicalId":335831,"journal":{"name":"2006 International Workshop on Satellite and Space Communications","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130532114","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}
{"title":"An Analysis of TCP Startup over an Experimental DVB-RCS Platform","authors":"A. Gotta, Francesco Potortì, Raffaello Secchi","doi":"10.1109/IWSSC.2006.256018","DOIUrl":"https://doi.org/10.1109/IWSSC.2006.256018","url":null,"abstract":"Satellite systems are evolving towards higher available bandwidths and dynamic allocation based on instantaneous traffic rates offered at the stations, so called BoD (bandwidth on demand) channel sharing. This trend is paired with more and more powerful error correcting schemes, like those adopted in the recent DVB-S2 standard, which promise to make the channel virtually immune from packet errors. These factors, together with the significant round-trip delay of geostationary satellites, combine so that most TCP connections would send all of their data during the slow start phase. We investigate the performance of TCP during startup on recent BoD system by observing and explaining the behavior of different TCP flavors on different systems when transmitting data over the Eutelsat's Skyplex data satellite system. We make recommendations for choosing and improving TCP implementations and for future BoD allocation schemes","PeriodicalId":335831,"journal":{"name":"2006 International Workshop on Satellite and Space Communications","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126248845","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}
{"title":"Advanced propagation models studied within SatNEx for adaptive satcom systems at Ka and Q/V bands","authors":"L. Castanet","doi":"10.1109/IWSSC.2006.256043","DOIUrl":"https://doi.org/10.1109/IWSSC.2006.256043","url":null,"abstract":"The objective of this tutorial is to describe recent activities carried out in this field especially within the network of excellence SatNEx. In a first part, the temporal behaviour of the propagation channel is addressed thanks to the use of time series synthesisers. In a second part, it is shown how space variation of propagation impairments is described with the development of generators of rain attenuation fields. Then, the hot topic of the space-time variability of the propagation channel is introduced, which is the objective of actual work carried out within SatNEx","PeriodicalId":335831,"journal":{"name":"2006 International Workshop on Satellite and Space Communications","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126722816","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}
{"title":"Video Traffic Management in HSDPA via GEO Satellite","authors":"G. Giambene, S. Giannetti, C. P. Niebla, M. Ries","doi":"10.1109/IWSSC.2006.256021","DOIUrl":"https://doi.org/10.1109/IWSSC.2006.256021","url":null,"abstract":"This paper investigates video traffic management and packet-scheduling aspects for satellite Universal Mobile Telecommunication System (S-UMTS) transmissions based on high speed downlink packet access via geostationary satellite (S-HSDPA). In particular, this paper surveys resource allocation constraints to be considered for S-HSDPA and investigates the performance of different scheduling schemes in the presence of a GOOD/BAD channel and their influence on the objective video quality for typical UMTS video streaming scenarios. This work has been carried out within the framework of the European SatNEx II network of excellence","PeriodicalId":335831,"journal":{"name":"2006 International Workshop on Satellite and Space Communications","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126760776","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}
{"title":"IP in Space - Selected Topics on Network Architecture and Management","authors":"K.-P. Doerpelkus","doi":"10.1109/IWSSC.2006.256040","DOIUrl":"https://doi.org/10.1109/IWSSC.2006.256040","url":null,"abstract":"IP is the \"glue\" that allows building converged architectures for data, voice and video applications. While this is especially true for the Internet and terrestrial networks used in enterprises and, for example, governments in both civil as well as military applications - \"IP in Space\" is still in its infancy. Some benefits of using IP (and \"commercial-of-the-shelf\" COTS technologies) in space are obvious (lower mission cost, new concepts of operation, interoperability, access to all kind of broadband services for anybody, anytime, anywhere ...) there are also technical challenges caused by, for example, protocol design and network control and management. The lecture will address some of the protocol issues (TCP and PEPs, mobility, routing in space) as well as end-to-end concepts (QoS, management etc.) for space-based networks and networks that contain space segments","PeriodicalId":335831,"journal":{"name":"2006 International Workshop on Satellite and Space Communications","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132590121","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}