Pub Date : 2009-10-13DOI: 10.1109/IWSSC.2009.5286335
J. Radzik, A. Aroumont, M. Bousquet, L. Castanet, N. Jeannin
Tabatinga is a SATNEX initiative aimed at defining and designing a DVB-S2/RCS Wi-MAX system to provide access network services over the Amazonian region of Brazil at Ku band. This paper summarizes the work done on the physical and MAC layer aspects of that system.
{"title":"Hybrid Satellite-WiMAX architecture and access design for tropical areas","authors":"J. Radzik, A. Aroumont, M. Bousquet, L. Castanet, N. Jeannin","doi":"10.1109/IWSSC.2009.5286335","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286335","url":null,"abstract":"Tabatinga is a SATNEX initiative aimed at defining and designing a DVB-S2/RCS Wi-MAX system to provide access network services over the Amazonian region of Brazil at Ku band. This paper summarizes the work done on the physical and MAC layer aspects of that system.","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":"124794931","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 : 2009-10-13DOI: 10.1109/IWSSC.2009.5286438
F. Cercas
{"title":"PhD session 1 (room A+B) coding and modulation I","authors":"F. Cercas","doi":"10.1109/IWSSC.2009.5286438","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286438","url":null,"abstract":"","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"18 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":"127201103","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 : 2009-10-13DOI: 10.1109/IWSSC.2009.5286371
P. Kantor, G. Toth, Árpád Drozdy, J. Bitó
The Broadband Fixed Wireless Access (BFWA) networks are terrestrial systems operating at high carrier frequencies (above 20 GHz), therefore one of the most harmful circumstantial factors in these systems is the attenuation caused by precipitation, especially by rain. Employing site diversity is a well-known method to improve the signal to interference plus noise ratio conditions within the BFWA network. The backbone of a BFWA can be wired or wireless terrestrial, however the connection between base stations and the operator's core network can be also established by high frequency satellite links. Applying a satellite backbone system and route diversity between the Earth-space links can compensate precipitation attenuation. In this paper the efficiency of the diversity scheme in a satellite backbone network for BFWA system will be presented.
{"title":"Diversity investigation of satellite backbone network for BFWA systems","authors":"P. Kantor, G. Toth, Árpád Drozdy, J. Bitó","doi":"10.1109/IWSSC.2009.5286371","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286371","url":null,"abstract":"The Broadband Fixed Wireless Access (BFWA) networks are terrestrial systems operating at high carrier frequencies (above 20 GHz), therefore one of the most harmful circumstantial factors in these systems is the attenuation caused by precipitation, especially by rain. Employing site diversity is a well-known method to improve the signal to interference plus noise ratio conditions within the BFWA network. The backbone of a BFWA can be wired or wireless terrestrial, however the connection between base stations and the operator's core network can be also established by high frequency satellite links. Applying a satellite backbone system and route diversity between the Earth-space links can compensate precipitation attenuation. In this paper the efficiency of the diversity scheme in a satellite backbone network for BFWA system will be presented.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"54 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":"130213273","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 : 2009-10-13DOI: 10.1109/IWSSC.2009.5286421
H. Cruickshank, R. Mort, G. Giambene, M. Berioli
The future development of broadband satellite systems providing services based on the Internet Protocol (IP) needs to be stimulated by means of common standards. This paper presents the ETSI BSM PEP terminal architecture and PEP usage scenarios. In addition this paper shows the benefits of cross-layer improvements, where the TCP traffic sent by STs through an NCC/Gateway that acts as a PEP-spoofer on ACKs going in the opposite direction.
{"title":"BSM integrated PEP with cross-layer improvements","authors":"H. Cruickshank, R. Mort, G. Giambene, M. Berioli","doi":"10.1109/IWSSC.2009.5286421","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286421","url":null,"abstract":"The future development of broadband satellite systems providing services based on the Internet Protocol (IP) needs to be stimulated by means of common standards. This paper presents the ETSI BSM PEP terminal architecture and PEP usage scenarios. In addition this paper shows the benefits of cross-layer improvements, where the TCP traffic sent by STs through an NCC/Gateway that acts as a PEP-spoofer on ACKs going in the opposite direction.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"59 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":"114083074","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 : 2009-10-13DOI: 10.1109/IWSSC.2009.5286383
S. Spinsante, E. Gambi
The goal of partial encryption of a generic bit stream is to make the entire stream somehow useless for anyone that cannot decrypt its ciphered subset. In this paper we investigate the possibility of applying selective encryption to efficiently protect compressed space image data, during their transmission from payload instruments to Earth receiving stations. As a matter of fact, since many years, secure transmission of space data collected by scientific missions has not been considered necessary; but the trend is rapidly changing, and the availability of robust and efficient solutions to protect data integrity during their transmission may be a valuable asset.
{"title":"Selective encryption for efficient and secure transmission of compressed space images","authors":"S. Spinsante, E. Gambi","doi":"10.1109/IWSSC.2009.5286383","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286383","url":null,"abstract":"The goal of partial encryption of a generic bit stream is to make the entire stream somehow useless for anyone that cannot decrypt its ciphered subset. In this paper we investigate the possibility of applying selective encryption to efficiently protect compressed space image data, during their transmission from payload instruments to Earth receiving stations. As a matter of fact, since many years, secure transmission of space data collected by scientific missions has not been considered necessary; but the trend is rapidly changing, and the availability of robust and efficient solutions to protect data integrity during their transmission may be a valuable asset.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"9 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":"115158873","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 : 2009-10-13DOI: 10.1109/IWSSC.2009.5286376
Aiyetoro Gbolahan, Takawira Fambirai
This paper investigates the effect of the Signal to Noise Ratio (SNR) margin, h, that is used to compensate for the long propagation delay experienced in Satellite High Speed Downlink Packet Access (S-HSDPA) air interface. Satellite Systems are expected to complement the terrestrial access network and work with the same core network. The geostationary bent-pipe satellite has been considered for this work. A cross-layer study of the effect of the physical layer on the performance of TCP based traffic was conducted by varying margin values. A 3-state markov channel model has been used for this work. Our aim is to investigate the impact of the margin on TCP performance and recommend the optimal margin for this channel model. We also investigate if the TCP performance for varying margins will remain consistent for different environment and TCP versions.
{"title":"Effect of SNR margin in TCP performance for HSDPA via GEO satellite","authors":"Aiyetoro Gbolahan, Takawira Fambirai","doi":"10.1109/IWSSC.2009.5286376","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286376","url":null,"abstract":"This paper investigates the effect of the Signal to Noise Ratio (SNR) margin, h, that is used to compensate for the long propagation delay experienced in Satellite High Speed Downlink Packet Access (S-HSDPA) air interface. Satellite Systems are expected to complement the terrestrial access network and work with the same core network. The geostationary bent-pipe satellite has been considered for this work. A cross-layer study of the effect of the physical layer on the performance of TCP based traffic was conducted by varying margin values. A 3-state markov channel model has been used for this work. Our aim is to investigate the impact of the margin on TCP performance and recommend the optimal margin for this channel model. We also investigate if the TCP performance for varying margins will remain consistent for different environment and TCP versions.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"48 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":"132734450","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 : 2009-10-13DOI: 10.1109/IWSSC.2009.5286429
A. Solano, A. Salas, Juan Manuel Rodríguez, D. Rizou, Cristina Arias
This paper presents MEDNET's EC FP7 project telemedicine network solution and its validation performed during the integration and validation phase. This network solution runs over AmerHis broadband satellite multimedia commercial system, embarked over AMAZONAS1 satellite and owned by HISPASAT. During the integration and validation phase of the telemedicine network solution, different medical applications have been merged into a telemedicine solution that has been validated over AmerHis In-Factory test-bed. The testbed replicates the core network architecture that will be deployed in the Brazilian and Peruvian sites involved in MedNET. It also satisfies the TeleMedicine requirements of the project. The results are valuable inputs to the ongoing field installation phase.
{"title":"MedNET: Telemedicine over AmerHis system","authors":"A. Solano, A. Salas, Juan Manuel Rodríguez, D. Rizou, Cristina Arias","doi":"10.1109/IWSSC.2009.5286429","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286429","url":null,"abstract":"This paper presents MEDNET's EC FP7 project telemedicine network solution and its validation performed during the integration and validation phase. This network solution runs over AmerHis broadband satellite multimedia commercial system, embarked over AMAZONAS1 satellite and owned by HISPASAT. During the integration and validation phase of the telemedicine network solution, different medical applications have been merged into a telemedicine solution that has been validated over AmerHis In-Factory test-bed. The testbed replicates the core network architecture that will be deployed in the Brazilian and Peruvian sites involved in MedNET. It also satisfies the TeleMedicine requirements of the project. The results are valuable inputs to the ongoing field installation phase.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"144 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":"133389356","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 : 2009-10-13DOI: 10.1109/IWSSC.2009.5286423
Y. F. Hu, P. Pillai, Matteo Beriolli
This paper presents an extension for Broadband Satellite Multimedia (BSM) to support Mobility Management (MM). To support seamless handovers, mobility related entities are proposed in the Satellite Independent Access Function (SIAF) defined over the SI-SAP interface. This enables the mapping of the mobility related primitives between the higher layer and the satellite dependant lower layers via the Satellite Dependent Access Function (SDAF). The proposed MM architecture incorporates the Media Independent Handover Services defined in the IEEE802.21 to support handover between different satellite systems. This includes definition of the Media Independent Handover Function (MIHF) which provides 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 (MIIS). A detailed description of the function architecture and a case study showing the signalling interaction between MIH and SI-SAP primitves are presented.
{"title":"Mobility extension for Broadband Satellite Multimedia","authors":"Y. F. Hu, P. Pillai, Matteo Beriolli","doi":"10.1109/IWSSC.2009.5286423","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286423","url":null,"abstract":"This paper presents an extension for Broadband Satellite Multimedia (BSM) to support Mobility Management (MM). To support seamless handovers, mobility related entities are proposed in the Satellite Independent Access Function (SIAF) defined over the SI-SAP interface. This enables the mapping of the mobility related primitives between the higher layer and the satellite dependant lower layers via the Satellite Dependent Access Function (SDAF). The proposed MM architecture incorporates the Media Independent Handover Services defined in the IEEE802.21 to support handover between different satellite systems. This includes definition of the Media Independent Handover Function (MIHF) which provides 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 (MIIS). A detailed description of the function architecture and a case study showing the signalling interaction between MIH and SI-SAP primitves are presented.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"1028 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":"134286934","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 : 2009-10-13DOI: 10.1109/IWSSC.2009.5286333
M. Ali, L. Liang, Z. Sun, H. Cruickshank
With the rapid development of the Internet, new technologies and applications are emerging. One of the important applications is voice over IP. Satellites are playing an important role to provide VoIP services with their global coverage and on-board processing ability over IP networks. Satellite network environment, generally characterized by large delay and erroneous link, is considered to be unfriendly to VoIP. The performance of VoIP is adversely influenced by these characteristics. The performance metrics of VoIP are signaling, bandwidth, delay, jitter and packet loss. Signaling plays a key role in call establishment and rest of the parameters signifies the quality of service (QoS). In this paper, the performance related issues of SIP-based VoIP over current, IPv4, and next generation, IPv6 satellites is studied. A comparative analysis is performed for different voice codecs. The experimentation is carried out on the satellite network testbed at Centre for Communication Systems Research (CCSR), University of Surrey. The results show that delay, jitter and packet loss are quite comparable for both IPv4 and IPv6 over satellites. SIP signaling performs poorly in IPv6 as compared to IPv4. IPv6 can be adapted for VoIP over satellites, but with some modifications for SIP signaling.
{"title":"SIP signaling and QoS for VoIP over IPv6 DVB-RCS satellite networks","authors":"M. Ali, L. Liang, Z. Sun, H. Cruickshank","doi":"10.1109/IWSSC.2009.5286333","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286333","url":null,"abstract":"With the rapid development of the Internet, new technologies and applications are emerging. One of the important applications is voice over IP. Satellites are playing an important role to provide VoIP services with their global coverage and on-board processing ability over IP networks. Satellite network environment, generally characterized by large delay and erroneous link, is considered to be unfriendly to VoIP. The performance of VoIP is adversely influenced by these characteristics. The performance metrics of VoIP are signaling, bandwidth, delay, jitter and packet loss. Signaling plays a key role in call establishment and rest of the parameters signifies the quality of service (QoS). In this paper, the performance related issues of SIP-based VoIP over current, IPv4, and next generation, IPv6 satellites is studied. A comparative analysis is performed for different voice codecs. The experimentation is carried out on the satellite network testbed at Centre for Communication Systems Research (CCSR), University of Surrey. The results show that delay, jitter and packet loss are quite comparable for both IPv4 and IPv6 over satellites. SIP signaling performs poorly in IPv6 as compared to IPv4. IPv6 can be adapted for VoIP over satellites, but with some modifications for SIP signaling.","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":"132881307","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 : 2009-10-13DOI: 10.1109/IWSSC.2009.5286435
A. Gotta, E. Ferro, F. Potortì
In case of video streaming services via satellite towards vehicular clients, very long blockage periods due to road infrastructures, vegetation, and so on, may lead to a complete channel outage, which may result in the loss of all packets transmitted during that period, even in the presence of interleaving and FEC techniques. But if these periods are predictable, as in the presence of known routes traced by means of a GPS navigator, it may be advisable to alert the transmitter in advance, in order to counteract the incoming outage interval. We refer to this technique as Smart Mode. In the following we will detail how Smart Mode takes advantage of FEC and interleaving techniques, in order to improve the Quality of Experience and to reduce the waste of bandwidth in satellite multimedia streaming.
{"title":"Quality of Experience in Satellite video streaming transmissions in urban vehicular environment","authors":"A. Gotta, E. Ferro, F. Potortì","doi":"10.1109/IWSSC.2009.5286435","DOIUrl":"https://doi.org/10.1109/IWSSC.2009.5286435","url":null,"abstract":"In case of video streaming services via satellite towards vehicular clients, very long blockage periods due to road infrastructures, vegetation, and so on, may lead to a complete channel outage, which may result in the loss of all packets transmitted during that period, even in the presence of interleaving and FEC techniques. But if these periods are predictable, as in the presence of known routes traced by means of a GPS navigator, it may be advisable to alert the transmitter in advance, in order to counteract the incoming outage interval. We refer to this technique as Smart Mode. In the following we will detail how Smart Mode takes advantage of FEC and interleaving techniques, in order to improve the Quality of Experience and to reduce the waste of bandwidth in satellite multimedia streaming.","PeriodicalId":137431,"journal":{"name":"2009 International Workshop on Satellite and Space Communications","volume":"26 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":"132763868","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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