Pub Date : 2008-10-24DOI: 10.1109/IWSSC.2008.4656821
P. Barsocchi, G. Oligeri
With the development of broadcast wireless networks high efficiency of wireless video transmission has been received increasingly greater attentions than before. Multimedia streaming services via hybrid networks, constituted by terrestrial wireless networks linked together by satellite, present major challenge in the management of network bandwidth. In this paper we propose a novel approach based on a packet level and a bit level FEC for improving the quality of service of multicast video streaming. We performed an extensive measurement campaign in an indoor scenario evaluating a statistical description of the bit error distribution for the terrestrial wireless link. We show that a bit level FEC can decrease the bandwidth wasting due to the application of an upper layer FEC only. Finally, we evaluate the performance of our approach in terms of recovered packets, bandwidth saving, and video quality.
{"title":"A novel approach for multicast video streaming in hybrid networks","authors":"P. Barsocchi, G. Oligeri","doi":"10.1109/IWSSC.2008.4656821","DOIUrl":"https://doi.org/10.1109/IWSSC.2008.4656821","url":null,"abstract":"With the development of broadcast wireless networks high efficiency of wireless video transmission has been received increasingly greater attentions than before. Multimedia streaming services via hybrid networks, constituted by terrestrial wireless networks linked together by satellite, present major challenge in the management of network bandwidth. In this paper we propose a novel approach based on a packet level and a bit level FEC for improving the quality of service of multicast video streaming. We performed an extensive measurement campaign in an indoor scenario evaluating a statistical description of the bit error distribution for the terrestrial wireless link. We show that a bit level FEC can decrease the bandwidth wasting due to the application of an upper layer FEC only. Finally, we evaluate the performance of our approach in terms of recovered packets, bandwidth saving, and video quality.","PeriodicalId":137382,"journal":{"name":"2008 IEEE International Workshop on Satellite and Space Communications","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122495601","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}
Pub Date : 2008-10-24DOI: 10.1109/IWSSC.2008.4656803
B. Jung, J. Chun
This paper presents a novel algorithm for synthesizing arbitrary footprint for planar array. Simulated annealing is used to optimize the footprint pattern. Since the far field pattern of an antenna aperture can be estimated from the 2-dimension Fourier transform of the aperture distribution in rectangular array, synthesizing process proceeds in the frequency domain. In many applications, the word length is limited for various reasons. Main reasons are the computational complexity and the system limitation. In this paper, finite word length control is considered for the practical considerations.
{"title":"Arbitrary footprint synthesis for planar array with finite bit control","authors":"B. Jung, J. Chun","doi":"10.1109/IWSSC.2008.4656803","DOIUrl":"https://doi.org/10.1109/IWSSC.2008.4656803","url":null,"abstract":"This paper presents a novel algorithm for synthesizing arbitrary footprint for planar array. Simulated annealing is used to optimize the footprint pattern. Since the far field pattern of an antenna aperture can be estimated from the 2-dimension Fourier transform of the aperture distribution in rectangular array, synthesizing process proceeds in the frequency domain. In many applications, the word length is limited for various reasons. Main reasons are the computational complexity and the system limitation. In this paper, finite word length control is considered for the practical considerations.","PeriodicalId":137382,"journal":{"name":"2008 IEEE International Workshop on Satellite and Space Communications","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122756010","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}
Pub Date : 2008-10-24DOI: 10.1109/IWSSC.2008.4656814
Hyunseok Yu, Sungjin Park, H.S. Oh, Kyung-ho Kim
We consider a simple downlink code division multiple access (CDMA) system in which user signals are transmitted in a single-frequency network (SFN) channel. The SFN channel has always been a problem in mobile communication or broadcasting channel due to its huge delay spread. Generally, we suffer from multiple access interference (MAI) caused by the multipath channel and MAI becomes worse when the terminal meets the SFN channel. In this paper we present a receiver algorithm which performs adaptive channel equalization efficiently in the harsh SFN mobile channel with considerably low complexity. We will cover some methods for a chip equalizer implementation and evaluate their performances in a simple short delay channel and SFN channel. Also, effects of frequency offsets of the base-station (repeater) are investigated as a consideration for practical applications.
{"title":"Hybrid chip-rate equalization of downlink CDMA in SFN channel","authors":"Hyunseok Yu, Sungjin Park, H.S. Oh, Kyung-ho Kim","doi":"10.1109/IWSSC.2008.4656814","DOIUrl":"https://doi.org/10.1109/IWSSC.2008.4656814","url":null,"abstract":"We consider a simple downlink code division multiple access (CDMA) system in which user signals are transmitted in a single-frequency network (SFN) channel. The SFN channel has always been a problem in mobile communication or broadcasting channel due to its huge delay spread. Generally, we suffer from multiple access interference (MAI) caused by the multipath channel and MAI becomes worse when the terminal meets the SFN channel. In this paper we present a receiver algorithm which performs adaptive channel equalization efficiently in the harsh SFN mobile channel with considerably low complexity. We will cover some methods for a chip equalizer implementation and evaluate their performances in a simple short delay channel and SFN channel. Also, effects of frequency offsets of the base-station (repeater) are investigated as a consideration for practical applications.","PeriodicalId":137382,"journal":{"name":"2008 IEEE International Workshop on Satellite and Space Communications","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127957376","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}
Pub Date : 2008-10-24DOI: 10.1109/IWSSC.2008.4656741
G. Carrie, L. Castanet, F. Lacoste
To develop and test real time fade mitigation techniques control algorithms, propagation time series are needed. An alternative to using real data collected from propagation experiments is to generate typical fading time series making use of climatological characteristics as well as geometrical and radio-electrical parameters of the link. The aim of the study presented in this paper is to validate time-series synthesisers relying on an enhanced Maseng-Bakken model for temperate areas. In the first part of this paper, the basic principles of the Maseng-Baken model are recalled and the parameterisation of this channel model is discussed for temperate climates. Then, Ka band beacon data collected in European and in North-American areas are used: on the one hand to retrieve the input parameters of the channel models and on the other hand to test them with respect to long-term statistics. The results of this testing analysis constitute the second part of this paper.
{"title":"Validation of rain attenuation time series synthesizers for temperate area - on the enhanced Maseng-Bakken model","authors":"G. Carrie, L. Castanet, F. Lacoste","doi":"10.1109/IWSSC.2008.4656741","DOIUrl":"https://doi.org/10.1109/IWSSC.2008.4656741","url":null,"abstract":"To develop and test real time fade mitigation techniques control algorithms, propagation time series are needed. An alternative to using real data collected from propagation experiments is to generate typical fading time series making use of climatological characteristics as well as geometrical and radio-electrical parameters of the link. The aim of the study presented in this paper is to validate time-series synthesisers relying on an enhanced Maseng-Bakken model for temperate areas. In the first part of this paper, the basic principles of the Maseng-Baken model are recalled and the parameterisation of this channel model is discussed for temperate climates. Then, Ka band beacon data collected in European and in North-American areas are used: on the one hand to retrieve the input parameters of the channel models and on the other hand to test them with respect to long-term statistics. The results of this testing analysis constitute the second part of this paper.","PeriodicalId":137382,"journal":{"name":"2008 IEEE International Workshop on Satellite and Space Communications","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132007644","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}
Pub Date : 2008-10-24DOI: 10.1109/IWSSC.2008.4656738
P. Valtr, F. Pérez-Fontán
This paper is aimed at characterization of multipath propagation in land mobile satellite scenarios. Of particular interest is the average multipath power coming from scattering of electromagnetic waves from rough building surface. Method of physical optics was implemented to model scattering from rough building facades. The results in terms of time series of the received power are used to obtain statistics of multipath power for various roughness parameters of the building faccedilade and various elevations and azimuths of the transmitter. The results obtained can be used to predict signal propagation in urban environments or as input data to time series generating models.
{"title":"Modeling of wave scattering from rough building surface for land mobile satellite channel","authors":"P. Valtr, F. Pérez-Fontán","doi":"10.1109/IWSSC.2008.4656738","DOIUrl":"https://doi.org/10.1109/IWSSC.2008.4656738","url":null,"abstract":"This paper is aimed at characterization of multipath propagation in land mobile satellite scenarios. Of particular interest is the average multipath power coming from scattering of electromagnetic waves from rough building surface. Method of physical optics was implemented to model scattering from rough building facades. The results in terms of time series of the received power are used to obtain statistics of multipath power for various roughness parameters of the building faccedilade and various elevations and azimuths of the transmitter. The results obtained can be used to predict signal propagation in urban environments or as input data to time series generating models.","PeriodicalId":137382,"journal":{"name":"2008 IEEE International Workshop on Satellite and Space Communications","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123712282","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}
Pub Date : 2008-10-24DOI: 10.1109/IWSSC.2008.4656737
N. Moraitis, P. Constantinou, F. Fontán, Pavel Valtr
This paper presents a measurement campaign conducted inside a Boeing 737-400 aircraft for the development of in-cabin wireless networks. The measurements were conducted in three different frequency bands in order to provide various services. It was found that the path loss factor along the aircraft corridor varies between 2.1 and 2.3 depending on frequency. In respect the path loss factor ranges between 2.0 and 3.9 at the passenger seats. Propagation prediction technique based on Physical Optics was applied to the cabin scenario to obtain comparison of theoretically predicted values and measurements.
{"title":"In-cabin propagation measurements and comparison with EM techniques","authors":"N. Moraitis, P. Constantinou, F. Fontán, Pavel Valtr","doi":"10.1109/IWSSC.2008.4656737","DOIUrl":"https://doi.org/10.1109/IWSSC.2008.4656737","url":null,"abstract":"This paper presents a measurement campaign conducted inside a Boeing 737-400 aircraft for the development of in-cabin wireless networks. The measurements were conducted in three different frequency bands in order to provide various services. It was found that the path loss factor along the aircraft corridor varies between 2.1 and 2.3 depending on frequency. In respect the path loss factor ranges between 2.0 and 3.9 at the passenger seats. Propagation prediction technique based on Physical Optics was applied to the cabin scenario to obtain comparison of theoretically predicted values and measurements.","PeriodicalId":137382,"journal":{"name":"2008 IEEE International Workshop on Satellite and Space Communications","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116764369","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}
Pub Date : 2008-10-24DOI: 10.1109/IWSSC.2008.4656809
M. Buti, A. Paraboni, P. Gabellini
This paper describes the results obtained within a contract between the ESA, Politecnico di Milano and Space Engineering, in the section related to the study of an advanced satellite-based system for TV broadcasting in Ka Band. The system is characterized by the possibility of radiating the flux on the served region adaptively, in order to address more power in the zones suffering strong fades (i.e. where it is raining). Weather conditions and expected fades over the service area are assessed with the help of input data coming from the Meteosat satellite and the European Centre of Medium-term Weather Forecasting (ECMWF). Suitable mathematical models are applied, and an optimized distribution of power is evaluated. The paper shortly presents the work procedures of the system, and the performances obtained against an analogue ldquostaticrdquo system, that makes use of the same Front-End and of a climatology-based fixed distribution of power. Results derive from simulations of a 4-years period of work over the European territory.
{"title":"Analysis of performances of a Ka Band reconfigurable satellite antenna Front-End in a broadcasting application over the European territory","authors":"M. Buti, A. Paraboni, P. Gabellini","doi":"10.1109/IWSSC.2008.4656809","DOIUrl":"https://doi.org/10.1109/IWSSC.2008.4656809","url":null,"abstract":"This paper describes the results obtained within a contract between the ESA, Politecnico di Milano and Space Engineering, in the section related to the study of an advanced satellite-based system for TV broadcasting in Ka Band. The system is characterized by the possibility of radiating the flux on the served region adaptively, in order to address more power in the zones suffering strong fades (i.e. where it is raining). Weather conditions and expected fades over the service area are assessed with the help of input data coming from the Meteosat satellite and the European Centre of Medium-term Weather Forecasting (ECMWF). Suitable mathematical models are applied, and an optimized distribution of power is evaluated. The paper shortly presents the work procedures of the system, and the performances obtained against an analogue ldquostaticrdquo system, that makes use of the same Front-End and of a climatology-based fixed distribution of power. Results derive from simulations of a 4-years period of work over the European territory.","PeriodicalId":137382,"journal":{"name":"2008 IEEE International Workshop on Satellite and Space Communications","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116844555","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}
Pub Date : 2008-10-01DOI: 10.1109/IWSSC.2008.4656773
R. Secchi, Arjuna Sathiaseelan, G. Fairhurst
We discuss in this paper basic requirements of an RCST gateway supporting VoIP traffic without strict QoS provisioning. Besides easing the system design, a QoS management not based on reservation is suitable to accomplish changes in traffic scenarios and to support new applications. The main elements of this architecture are illustrated throughout the paper following a layered structure. A preliminary set of simulations is presented to point out benefits and to identify major issues. Implications of buffer management, different scheduling algorithms, and bandwidth allocation protocols are analysed.
{"title":"Scheduling TCP-friendly flows over a satellite network","authors":"R. Secchi, Arjuna Sathiaseelan, G. Fairhurst","doi":"10.1109/IWSSC.2008.4656773","DOIUrl":"https://doi.org/10.1109/IWSSC.2008.4656773","url":null,"abstract":"We discuss in this paper basic requirements of an RCST gateway supporting VoIP traffic without strict QoS provisioning. Besides easing the system design, a QoS management not based on reservation is suitable to accomplish changes in traffic scenarios and to support new applications. The main elements of this architecture are illustrated throughout the paper following a layered structure. A preliminary set of simulations is presented to point out benefits and to identify major issues. Implications of buffer management, different scheduling algorithms, and bandwidth allocation protocols are analysed.","PeriodicalId":137382,"journal":{"name":"2008 IEEE International Workshop on Satellite and Space Communications","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126898153","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}
Pub Date : 2008-10-01DOI: 10.1109/IWSSC.2008.4656747
Yim-Fun Hu, P. Chan
The European Telecommunications Standards Institute (ETSI) is currently specifying standards for broadband satellite multimedia (BSM). This paper presents an overview on a possible mobility management (MM) architecture for BSM, where satellite independent access function (SIAF) for handover are defined over the SI-SAP interface to enable upper layer access to lower layers and to connect SIAF with the satellite dependent access function (SDAF). The MM architecture takes into account work currently being carried out in IEEE802.21, where media independent handover function (MIHF) is defined for interworking between heterogeneous 802 networks and between 802 and other terrestrial mobile networks through the support of three services for handover, namely, media independent event services (MIES), media independent command services (MICS) and media independent information services (IIS). The synergy of the IEEE802.21 MIHF with the BSM SI-SAP makes it an ideal reference framework for the development of the BSM mobility management architecture and for the harmonization of future integration between BSM and terrestrial networks.
{"title":"Mobility Management for BSM","authors":"Yim-Fun Hu, P. Chan","doi":"10.1109/IWSSC.2008.4656747","DOIUrl":"https://doi.org/10.1109/IWSSC.2008.4656747","url":null,"abstract":"The European Telecommunications Standards Institute (ETSI) is currently specifying standards for broadband satellite multimedia (BSM). This paper presents an overview on a possible mobility management (MM) architecture for BSM, where satellite independent access function (SIAF) for handover are defined over the SI-SAP interface to enable upper layer access to lower layers and to connect SIAF with the satellite dependent access function (SDAF). The MM architecture takes into account work currently being carried out in IEEE802.21, where media independent handover function (MIHF) is defined for interworking between heterogeneous 802 networks and between 802 and other terrestrial mobile networks through the support of three services for handover, namely, media independent event services (MIES), media independent command services (MICS) and media independent information services (IIS). The synergy of the IEEE802.21 MIHF with the BSM SI-SAP makes it an ideal reference framework for the development of the BSM mobility management architecture and for the harmonization of future integration between BSM and terrestrial networks.","PeriodicalId":137382,"journal":{"name":"2008 IEEE International Workshop on Satellite and Space Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127083276","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}
Pub Date : 1900-01-01DOI: 10.1109/iwssc.2008.4656788
G. Giambene
{"title":"PhD session 4 (Room A) Radio resource management","authors":"G. Giambene","doi":"10.1109/iwssc.2008.4656788","DOIUrl":"https://doi.org/10.1109/iwssc.2008.4656788","url":null,"abstract":"","PeriodicalId":137382,"journal":{"name":"2008 IEEE International Workshop on Satellite and Space Communications","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114643493","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}
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