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Long Term Evolution (LTE) technology is the evolution to 3G technology providing improvements for delivered services, such as voice calls with high-quality user experience characterized by higher throughput, low latency, and quality of service. This chapter evaluates the LTE network system composed by radio access and core network with impairments to LTE technology characteristics, introduced by geostationary satellite link as backhaul connectivity to the system. The study is carried out including tests of throughput, latency, and voice service that are provided through the satellite link. Two distinct environments, namely a simulated satellite link and a real-world satellite link, are taken into consideration. The first one is carefully assembled in the laboratory to reflect the typical effects of satellite link delay on the LTE protocol and its consequent impacts on data transmission and real-time services. The second environment features a real-world satellite link, made available to CPqD by a geostationary satellite network operator. The LTE network system used in both environments consists of practical devices and prototypes developed by CPqD for operation in the 450 MHz band, and targeting application in sparsely populated areas. Presented results show that satellite-based backhaul is a technically feasible option for LTE networks, and the introduced impairments are not a real limitation for provided services, thus leveraging the deployment of such networks in rural and sparsely populated remote areas. |
