Integrated Resource Management for Terrestrial-Satellite Systems

In satellite communication systems, satellite power and processing capacities are limited, which means that storage and security are also constrained. Satellite communication channels are extremely vulnerable to hackers and external interference signals. Protecting satellite networks from illegal information access and use can be extremely challenging. In this paper, an architecture composed of satellite and ground equipment is developed that integrates communication network authentication and privacy protection structures. In the proposed scheme, the communication, registration, authentication, and revocation of information are achieved through stages to improve communication security. The satellite forwards the collected information to a ground base station, which has a strong data processing capacity. The ground base station records all the key parameters in the distributed blockchain, and all malicious node certificates are removed from the system. To further enhance data transmission security, the key is transferred using an asymmetric encryption algorithm. To measure the robustness of using the proposed network architecture, under the same attack condition, an invulnerability analysis is performed. After conducting simulation experiments, the results show that the proposed scheme greatly improves communication security and protection.INDEX TERMS satellite communication system; communication network authentication; privacy protection scheme; ground base station I. INTRODUCTIONWith the rapid development of computer networks and communication technology, satellite communication has become one of the most important and promising transfer information technologies given its intrinsic advantages of long-range mobile communication, cost-effectiveness of multicast and broadcast systems, wide coverage area, and high flexibility. Satellite communications systems enable the sending and receiving of information worldwide, offering internet access, television, telephone, radio, and other civilian and military operations, the satellite network communication framework structure is shown in FIGURE. 1. The advent of HTS (high-throughput satellite) systems has greatly enhanced technical capabilities and offered wideband services at lower costs. Significant improvements are expected on the forthcoming mega-constellations in low Earth orbits that will deploy thousands of satellites, providing full earth coverage to minimize delays in addition to wide bandwidth. The use of satellites, given these characteristics, can increase efficiency in providing large sets of services and applications that are security-sensitive, such as telemedicine, banking, search and rescue, sensor networks, and content delivery network feed, which generate approximately 90% of the total traffic. However, in many cases, the security of satellite communication has been seriously compromised, resulting in covert dangers [1]. In satellite communications (and even in

Section: Blockchain Technologymentioning

confidence: 99%

Effective Methods and Performance Analysis of a Satellite Network Security Mechanism Based on Blockchain Technology

Zhang

2021

“…The paper [11] presents the Terrestrial-Satellite Resource Management (TSRM) scheme for the ITSN system. The main goal of this scheme is to guarantee both system throughput fairness and data security in terrestrial-satellite systems.…”

Section: Related Workmentioning

confidence: 99%

“…In addition, it provides several theorems and lemmas to explore the insights in optimizing the ITSN system performance. The TSRM scheme provides solution and guidelines for both the engineering implementation and the theoretical analysis of a fair and secure terrestrial-satellite system [11].…”

Section: Related Workmentioning

confidence: 99%

“…To validate our approach, simulation control factors and adjustment parameters are listed in Table I, and we set the simulation scenario for the ITSN system infrastructure. And then, the performance of the proposed scheme has been presented and analyzed by comparing with the SORA, TSCD, TSRM protocols in [3], [6], [11]. The assumptions of our simulation environments are as follows:…”

Section: Performance Evaluationmentioning

confidence: 99%

See 1 more Smart Citation

Bargaining-Based Spectrum Allocation Algorithm for High-Speed Railway Communications

Kim

2021

The explosive growth of data traffic in the high-speed railway (HSR) communications has attracted much research attention to boost technical innovations and developments for the next generation mobile communication networks. However, traditional terrestrial communication network is difficult to support various HSR service requirements while ensuring seamless coverage in ultra-wide regions. In this study, we develop a new spectrum allocation scheme for HSR communications. By leveraging satellite communications, our proposed scheme is implemented on the integrated terrestrial-satellite network (ITSN) platform. Based on the weighted proportional gain and loss bargaining solutions, our approach can adaptively share the limited ITSN spectrum resource with its tight interaction and complementary characteristics to satellite and terrestrial networks. To take full advantages of collaborative control process, the proposed coordinated bargaining paradigm explores the mutual benefits and achieve a reciprocal consensus under dynamically changing HSR communications. The obtained solution has globally desirable features to provide guidelines for the ITSN operation. Finally, numerical results demonstrate the strengths of our proposed scheme by using extensive simulations, and we highlight the open issues and future directions.

“…However, the offloading decision and computing resource allocation are not taken into consideration. The delay and power consumption for terrestrial-satellite systems are modeled and analyzed in [28] with joint computing and communication allocation, and the joint optimization problem is solved by using dual decomposition method. Wang et al conduct a computation offloading game framework for MEC enhanced satellite networks with considering the intermittent communication caused by satellite orbiting, and the response time and energy consumption of the tasks are optimized with the Nash equilibrium [29].…”

Section: A Related Workmentioning

confidence: 99%

Latency and Energy Optimization for MEC Enhanced SAT-IoT Networks

Cui

et al. 2020

128

Mobile edge computing (MEC) enhanced satellite based internet of things (SAT-IoT) is an important complement for terrestrial networks based IoT, especially for the remote and depopulated areas. For MEC enhanced SAT-IoT networks with multiple satellites and multiple satellite gateways, the coupled user association, offloading decision, computing and communication resource allocation should be jointly optimized to minimize the latency and energy cost. In this paper, the latency and energy optimization for MEC enhanced SAT-IoT networks are formulated as a dynamic mixed-integer programming problem, which is hard to obtain the optimal solutions. To tackle this problem, we decompose the complex problem into two sub-problems. The first one is computing and communication resource allocation with fixed user association and offloading decision, and the second one is joint user association and offloading with optimal resource allocation. For the sub-problem of resource allocation, the optimal solution is proven to be obtained based on Lagrange multiplier method. And then, the second sub-problem is further formulated as a Markov decision process (MDP), and a joint user association and offloading decision with optimal resource allocation (JUAOD-ORA) is proposed based on deep reinforcement learning (DRL). Simulation results show that the proposed approach can achieve better long-term reward in terms of latency and energy cost. INDEX TERMS Latency and energy optimization, MEC, SAT-IoT, deep reinforcement learning.