دانلود کتاب مبانی شبکه یکپارچه ماهواره‌ای-زمینی برای ارتباطات سیار

For the sake of meeting people’s demand for information capacity, mobile communication technology has evolved from the first-generation mobile communication system (1G) that only supported voice calls to the fifth-generation mobile communication system (5G), which is capable of supporting enhanced mobile bandwidth, massive connections, and ultra-low latency reliable transmission. The development of mobile communication not only accelerates the evolution of the scientific and technological revolution and industrial changes, but also greatly promotes the prosperity and development of economic society. Innovative applications such as virtual reality and augmented reality, industrial internet, internet of vehicles, telemedicine, and smart cities based on 5G communication are bringing qualitative benefits to people’s lives. However, the terrestrial network only covers about 20% of the earth’s surface land, which is less than 6% of the earth’s surface area. To provide seamless coverage services across the globe, satellite networks are essential to supplement the terrestrial network to jointly build a full-space three-dimensional communication network covering land, sea, air, and space. With the continuous evolution of the 3rd Generation Partnership Project (3GPP), 5G nonterrestrial network (NTN), and 6G space-terrestrial integrated technology, satellite and terrestrial networks are gradually forming a trend of deep integration. With the help of the advanced communication technology of the terrestrial network and the satellite industry, this integrated satellite-terrestrial network has entered a new and rapid development stage, realizing the ubiquitous connection of the land, sea, and air three-dimensional space for remote areas, deserts, oceans, aviation, and other areas, and providing individuals, enterprises, and governments with new services such as direct connection of mobile phones, wide-area IoT, and emergency rescue support. Unlike terrestrial mobile communication systems, an integrated satelliteterrestrial network faces more complex challenges, mainly including: 1. Huge differences of channel environment: Satellite communication has the characteristics of long propagation distance, high latency, and high mobility, which seriously affects the performance; 2. Limited capabilities of the satellite network element platform: The satellite load is limited, and resources such as communication, computing, and storage are severely limited, which restricts the capacity of the satellite communication system; 3. High-speed dynamic changes in network topology including routing and resource allocation. Only by solving these challenges can we fully realize the huge potential of the satellite-terrestrial integrated converged network, bring revolutionary changes to the field of communications, and provide more extensive, reliable, and efficient communication services. To address these issues, this book focuses on the theory and technology of integrated satellite-terrestrial network, which provides a comprehensive discussion on the research status, key technologies, open issues, and future development direction from the physical layer to the network layer.