38th International Communications Satellite Systems Conference (ICSSC 2021)最新文献

{"title":"Inclined MEO constellation to provide cost effective global high speed trunking services","authors":"J. Gayrard","doi":"10.1049/icp.2022.0551","DOIUrl":"https://doi.org/10.1049/icp.2022.0551","url":null,"abstract":"We define satellite trunking services as the provision of high data rate point-to-point links for professional use (B2B). The review of the global market for high-speed satellite trunking services shows an expected and sustained growth in the next five to ten years. Among the seven market segments that we have identified, the fastest growing segment will be in-flight connectivity for passenger aircraft. The demand for better connectivity on board cruise ships will make this the second-largest segment. Clearly, there is an opportunity to develop a global satellite system to provide high-speed trunk services. The equatorial MEO constellation of O3b has already shown the way. Through an ESA supported study, “Next Generation High Data Rate Trunking Systems”, an inclined MEO constellation has been identified and studied. Technically innovative and performing, it has also shown that it is economically viable. The system includes a 24-satellite MEO constellation with three 50 deg.-inclined orbits and a distribution/feeder ground network of 80 gateways worldwide spread over 20 sites. Satellites carry a powerful payload (500kg/5kW) operating in Ka-band. Each payload provides a User mission connecting aircrafts and vessels with 175 agile narrow beams and a Feeder mission linking ground gateways in two steerable beams. The Ka-band allocated to NGSO systems is shared between User mission and Feeder mission. The payload is based on next generation technologies such as active planar Direct Radiating Antennas (DRA), Digital Beam-Formers Networks (DBFN) embedded in Digital Transparent Processor (DTP). The business model consists in the wholesale of volume of data (GByte) by the satellite operator, owner of the constellation and its feeder segment, to specialized Internet Service Providers who are active in aeronautical and maritime Internet Access markets. Although very expensive, the constellation and its large feeder ground network achieves profitability for wholesale prices of the same order of magnitude as those identified as affordable by service providers in the next five years. This paper describes the global satellite trunking services and traffics, the MEO constellation and its feeder segment and it demonstrates the economic viability.","PeriodicalId":401042,"journal":{"name":"38th International Communications Satellite Systems Conference (ICSSC 2021)","volume":"2 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":"114069648","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":"Intelligent dynamic network traffic management for global network access terminal","authors":"Q. Zhao, X. Tian, Y. Li, K. D. Pham, J. Lyke, Guangyi Chen","doi":"10.1049/icp.2022.0549","DOIUrl":"https://doi.org/10.1049/icp.2022.0549","url":null,"abstract":"Leveraging a mixture of government-owned and commercial Satellite Communication (SATCOM) systems to provide global coverage with improved network throughputs and reliability has attracted attention from both academia and industry for years. However, utilizing multiple SATCOM services simultaneously through different satellite networks requires sophisticated traffic management due to large differences in connection properties. For example, commercial Non-GeoStationary Orbit (NGSO) Satellite Communication (SATCOM) networks have advantages of higher network throughputs, much lower propagation delay and more flexible on-demand services compared to Geosynchronous Equatorial Orbit (GEO) SATCOM systems. Global Network Access Terminal (GNAT) is considered herein as a potential solution designed and developed to provide Internet access utilizing multiple SATCOM services for improved throughput, delay, and reliability. In this paper, we propose a novel intelligent dynamic network traffic management solution based on Deep Reinforcement Learning (DRL) to better distribute the application traffics to different SATCOM networks. Specifically, we employ DRL to the GNAT control unit to generate a policy that maps measured network states to the optimal traffic distribution. The GNAT system periodically measures the network states, in terms of bandwidth and latency and determines the actions on distributing the traffic flows toward better network performance. Besides, the DRL-based solution will initially learn a policy and then improve this policy by continuously interacting with the GNAT system. To evaluate our solution and facilitate further research, we implement a testbed consisted of the GNAT hardware integrated with our proposed solution and a simulated network environment. Evaluation results are presented to prove that our solution outperforms the state-of-the-art techniques.","PeriodicalId":401042,"journal":{"name":"38th International Communications Satellite Systems Conference (ICSSC 2021)","volume":"49 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":"117271640","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":"System and methods for providing integrated 5G and satellite service in backhaul and edge computing applications","authors":"S. Roy","doi":"10.1049/icp.2022.0560","DOIUrl":"https://doi.org/10.1049/icp.2022.0560","url":null,"abstract":"5G technologies are knocking at the door and ready to be implemented. This paper analyses the requirements of the satellite network for its integration with the 5G terrestrial network concerning backhaul and edge computing scenarios. In a Cloud Radio Access Network (C-RAN) architecture, the paper proposes utilizing a low-latency Low Earth Orbit (LEO) constellation to provide the fronthaul demand in a hybrid deployment along with either optical fibre or microwave. For backhaul services between C-RAN and 5G core, LEO, or Geostationary Orbit (GEO) orbit, or both LEO and GEO in a hybrid configuration can be reliable and resilient. However, some challenges need to be resolved, which are captured in this paper. Satellite terminals hosted in the C-RAN or base station can provide virtualized computing and storage resources to host edge functions for specific applications by caching necessary information a priori to mitigate inherent large latency over the GEO satellite, for example, performing IoT server functions is suitable from the edge. The backhaul satellite network can be leased by content providers to multicast content to several C-RANs for edge caching. On the network side, this paper examines the integration of a satellite network as a network slice in the 5G core.","PeriodicalId":401042,"journal":{"name":"38th International Communications Satellite Systems Conference (ICSSC 2021)","volume":"3 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":"126860367","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":"Non-orthogonal transmission under flexible illumination patterns for advanced satellite payloads","authors":"T. Ramírez, C. Mosquera, N. Alagha","doi":"10.1049/icp.2022.0572","DOIUrl":"https://doi.org/10.1049/icp.2022.0572","url":null,"abstract":"This works proposes a flexible illumination pattern with nonorthogonal transmissions, which reuse the same carrier frequency in different beams, to enhance the service quality for a region of interest within the satellite footprint. In particular, we assume an advanced satellite communication payload architecture, allowing for a flexible allocation of power and bandwidth across beams together with active antenna subsystems to relocate beams. To take a full advantage of the flexible payload capabilities, a non-orthogonal transmission scheme, known as Space-Time Rate Splitting, is utilized that only requires a minimum amount of channel state information to be known at the transmitter. Performance improvements, in terms of the minimum user throughput up to 50% with respect to single beam orthogonal transmission have been identified, as long as user terminals can apply a single-state successive interference cancellation. Lower gain values are observed when non-orthogonal transmission and conventional single user detection techniques are deployed as the receiver.","PeriodicalId":401042,"journal":{"name":"38th International Communications Satellite Systems Conference (ICSSC 2021)","volume":"73 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":"127493412","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":"Gateway site diversity statistics for EHF band satellite systems","authors":"K. Ekerete, A. Awoseyila, B. Evans","doi":"10.1049/icp.2022.0578","DOIUrl":"https://doi.org/10.1049/icp.2022.0578","url":null,"abstract":"This paper evaluates diversity statistics between two satellite gateway sites in the United Kingdom, using beacon data from the Aldo-Paraboni experimental payload onboard Inmarsat's Alphasat at Q/V band. Rain fade measurements for the two gateway sites were analysed and diversity statistics were computed for the whole year 2017. Results demonstrate that significant spectral efficiency gains can be achieved during rain events depending on the switching thresholds. A lower switching threshold will achieve a higher probability of wide-ranging gains. However, this comes at the cost of shorter switch durations and higher number of switches. It is noted that the higher spectral efficiency gains which occur less frequently are achievable irrespective of whatever switching threshold in used. Therefore, the optimum switching threshold should be determined by the minimum switch duration that justifies the cost of switching in the specific satellite system.","PeriodicalId":401042,"journal":{"name":"38th International Communications Satellite Systems Conference (ICSSC 2021)","volume":"15 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":"125229268","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":"Variable-coded modulation and error-free transmission algorithms for an Exploratory In-orbit Verification of an E-Band (71-76 GHz) Satellite Link","authors":"L. Manoliu, S. Kumari, I. Kallfass","doi":"10.1049/icp.2022.0568","DOIUrl":"https://doi.org/10.1049/icp.2022.0568","url":null,"abstract":"This paper presents the concept for data throughput maximization for an Exploratory In-orbit Verification of an E/W-Band communication link considering the dynamic link budget for a CubeSat-based mission in Low Earth Orbit (LEO) and multi-Gigabit data rate. A variable-coded modulation scheme is implemented on the satellite payload computer and it is tested in a back-to-back configuration in order to maximize the data throughput, while taking into account the International Telecommunication Union (ITU) models for atmospheric effects, the satellite motion and the link quality, capacity and performance. By introducing an variable-coded modulation scheme the data throughput during one satellite overpass can be increased by at least 40% compared to a fixed modulation scheme.","PeriodicalId":401042,"journal":{"name":"38th International Communications Satellite Systems Conference (ICSSC 2021)","volume":"190 11 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":"131690381","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":"On the impact of phased array beam forming antennas on LEO satellite downlink capacity","authors":"M. Krondorf, R. Wünsche, D. Ehnert","doi":"10.1049/icp.2022.0559","DOIUrl":"https://doi.org/10.1049/icp.2022.0559","url":null,"abstract":"Phased array antennas are widely used in LEO communication systems. This hold for ground terminal antennas and LEO satellite antennas. Main purpose of phased array antennas is the electrical steering of the antenna without using mechanical devices. The drawback of such configurations is the discrete set of pointing vectors among the antenna controller can select the best suited steering. This paper shows how discrete beam pointing can reduce the average data rate of LEO satellite downlink connections.","PeriodicalId":401042,"journal":{"name":"38th International Communications Satellite Systems Conference (ICSSC 2021)","volume":"312 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":"116598674","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":"Gateway – a communications platform for lunar exploration","authors":"Sandra K. Johnson, Dale J. Mortensen, Mark A. Chavez, Christopher L. Woodland","doi":"10.1049/icp.2022.0544","DOIUrl":"https://doi.org/10.1049/icp.2022.0544","url":null,"abstract":"As stated by a NASA administrator, “NASA, International Partners, and commercial partner are going forward to the moon. With Artemis, we will be exploring more of the Moon than ever before, and this time we are planning to stay. We will be demonstrating new technologies, capabilities, and business approaches needed for future exploration of Mars.” To support the complex, Artemis exploration campaign envisioned, the Gateway program is developing a communication network orbiting the Moon. Gateway will provide relay communication paths and radiometric tracking between crewed and robotic systems on the lunar surface or in cis-lunar space to mission control on the Earth. This paper is a high-level description of Gateway's communication and ranging capabilities, the motivation and use of internationally developed interoperability standards, potential upgrade opportunities, and challenges as Gateway enables technology to support future Mars exploration.","PeriodicalId":401042,"journal":{"name":"38th International Communications Satellite Systems Conference (ICSSC 2021)","volume":"42 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":"116459153","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":"Framework for NASA space relay satellite services over the next decade: space relay partnership and services study","authors":"E. Knoblock, N. Pham, J. Downey, P. Paulsen, G. Haddad, M. Pepen, J. Drexler","doi":"10.1049/icp.2022.0545","DOIUrl":"https://doi.org/10.1049/icp.2022.0545","url":null,"abstract":"The United States National Space Policy provides guidance and directives for U.S. Government agencies to purchase commercial space services and capabilities to the maximum extent practical. In alignment with this guidance, the anticipated initial NASA near-Earth space relay operating capability over the next decade will be comprised of the existing NASA-owned Space Network infrastructure supplemented with commercially-owned and -provided relay satellites and their associated ground stations. NASA awarded contracts to eight study vendors in May 2019 to investigate the feasibility of applying commercial services concepts to the NASA user mission community. The studies, managed by NASA Glenn Research Center, detailed ten study topic areas. NASA completed the analysis and synthesis of these eight industry studies and other relevant information. The responses from the study vendors indicated a strong interest in providing commercial services to NASA missions, and included a wide range of proposed architectures and demonstration ideas. Overall, the responses indicated that a mature and healthy competitive environment exists across a broad spectrum of industry to deliver high-rate space relay services in the next three to five years. This paper will present an overview of the study, analysis and synthesis processes along with common themes and conclusions, and provide next steps and recommendations. The results of this study serve as a foundation for ongoing efforts to acquire interoperable space relay services for NASA missions from multiple commercial service providers.","PeriodicalId":401042,"journal":{"name":"38th International Communications Satellite Systems Conference (ICSSC 2021)","volume":"8 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":"128409736","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":"Design aspects of non-regular multibeam coverage for Ka-band broadband communication satellites","authors":"A. Catalani, M. Baldelli, E. Calà, E. Menargues, P. Angeletti, G. Toso","doi":"10.1049/icp.2022.0558","DOIUrl":"https://doi.org/10.1049/icp.2022.0558","url":null,"abstract":"The paper reports the results of a research project aiming at investigating an innovative non-regular multibeam antenna systems enabling the generation of shaped beams of different size and shape, whose profiles are able to match an assigned irregular lattice of polygonal cells. System analyses demonstrate the superiority of this approach with respect to conventional regular spot-beam and non-regular spot-beam payloads.","PeriodicalId":401042,"journal":{"name":"38th International Communications Satellite Systems Conference (ICSSC 2021)","volume":"44 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":"116638602","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}