scholarly journals Network Coding Design for Reliable Satellite Communication Services

Author(s):  
Do Tan
Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1601
Author(s):  
Asfandyar Awan ◽  
Zhao Qi ◽  
Shan Hu ◽  
Lijiang Chen

Cooperative communication supported by device to device (D2D)-LEO earthed satellite increases the performance of the resilient network and offloads base station. Additionally, network coding in a packet-based cooperative framework provides diversity and speedy recovery of lost packets. Cooperative communication advantages are subject to effective joint admission control strengthened by network coding for multiple interfaces. Joint admission control with network coding involves multiple constraints in terms of user selection, mode assignment, power allocation, and interface-based network codewords, which is challenging to solve collectively. Sub-problematization and its heuristic solution lead to a less complex solution. First, the adaptive terrestrial satellite power sentient network (ATSPSN) algorithm is proposed based on low complex convex linearization of mix integer non-linear problem (MINLP), NP-hard. ATSPSN provides optimum power allocation, mode assignment, and user selection based on joint channel conditions. Second, a multiple access network coding algorithm (MANC) is developed underlying the D2D-satellite network, which provides novel multiple interface random linear network codewords. At the end, the bi-directional matching algorithm aiming for joint admission control with network coding, named JAMANC-stream and JAMANC-batch communication, is proposed. JAMANC algorithm leads to a less complex solution and provides improved results in terms of capacity, power efficiency, and packet completion time. The theoretical lower and upper bounds are also derived for comparative study.


Author(s):  
В.С. АЛЕШИН ◽  
С.Г. ДОГАЕВ

Приведена количественная оценка реальных потребностей Российской Федерации в услугах подвижной спутниковой связи на период 2021-2030 гг. Оценка выполнялась путем прямого подсчета численности потенциальных потребителей услуг в разных сферах народного хозяйства России, включая ее Арктический регион и Северный морской путь, с учетом возможностей реализации альтернативных спутниковым вариантов предоставления этих услуг. A quantitative assessment of the real needs of the Russian Federation for mobile satellite communication services in 2021-2030 is presented. The assessment was carried out by directly calculating the number of potential consumers of services in various areas of the Russian economy, including its Arctic region and the Northern Sea Route, taking into account the possibilities of implementing alternative economic options for providing these services.


2014 ◽  
Vol 651-653 ◽  
pp. 1835-1839
Author(s):  
Yu Chen ◽  
Jia Shun Ren ◽  
Zhi Hao Zheng ◽  
Yu Xiang ◽  
Wei Yuan Wang

This paper introduces a satellite /3G+ multi-link communication terminal based on medical rescue information system, which provides 3G wireless network and satellite communication services and integrates cellular phone, maritime satellite terminal, BeiDou user device and Iridium phone [1]. The new terminal could improve the communication adaptability and transmission efficiency for the emergency medical rescue information system even in hostile environmental conditions [2] (such as earthquake, flood, and war). Tests showed that: this terminal has the advantages of simple access, rapid switch, efficient transmission, it can also guarantee timely and effective interaction of all kinds of information, so as to ensure the time-effect treatment for emergency medical rescue system [3].


2010 ◽  
Vol 8 ◽  
pp. 37-42 ◽  
Author(s):  
G. Saala ◽  
D. Müller ◽  
J. Hopf ◽  
S. Lindenmeier

Abstract. The link margin for satellite communication services targeting mobile users is tight. This leads to reception problems in areas with strong fading scenarios like urban areas or forested areas with dense foliage. In order to avoid loss of service in urban areas with week coverage by satellite signals, terrestrial repeaters are used. Therefore in the design of antennas for mobile reception of satellite services, an optimized characteristics for the satellite constellation, as well as an adequate coverage of the terrestrial repeaters has to be accounted for. In this paper an antenna with optimum shaped pattern for the satellite mode and adjustable gain for vertical polarization is investigated. Beside constraints regarding the radiation pattern, measurements concerning the dependence of the antenna on noise temperature and therefore the behavior in real noisy environments are carried out. A comparison with a conventional antenna shows the high performance of the new antenna in combination with a very low volume requirement.


Sign in / Sign up

Export Citation Format

Share Document