Joint Optimization of Resource Allocation with Inter-beam Interference for a Multi-beam Satellite and Terrestrial Communication System

Satellite plays an important role in the environment sensing during the emergency scenario, especially to robust to the natural disaster. Integrated satellite-terrestrial network which combines both advantages of the satellite network and the terrestrial network can achieve all-day seamless coverage and broad coverage areas. Integrated satellite and terrestrial networks can be used to solve communication problems in natural disasters, forestry monitoring and control, and military communication. Unlike traditional communication methods, integrated networks are effective solutions because of their advantages in communication, remote sensing, monitoring, navigation, and all-weather seamless coverage. Monitoring, urban management, and other aspects will also have a wide range of applications. The multi-beam satellite communication system increases spectrum utilization significantly, but it can cause satellite network and the terrestrial network intensive co-frequency interference. However, the exclusion zone makes the signal to interference and noise ratio (SINR) of the satellite-terrestrial link increase significantly. In this chapter, we propose a first builds an integrated network overlay model, and divides the satellite network into two categories: terrestrial network end users and satellite network end users. The energy efficiency, throughput, and signal-to-noise ratio (SINR) are deduced and analyzed. In this chapter, we discuss the influence of various factors, such as transmit power, number of users, size of the protected area, and terminal position, on energy efficiency and SINR. A satellite-sharing scheme with a combination of the user location and a protection zone with high energy efficiency and anti-jamming capability are proposed, to provide better communication quality for end users in integrated satellite and terrestrial networks. Finally, the numerical results show that the performance of proposed scheme is superior to the traditional integrated satellite-terrestrial scheme.