Considering the significance of addressing the network differentiation requirements stemming from terminal diversity and a variety of services in emergency power communication, the paper integrates the characteristics of mobile communication, and explore a lightweight wireless communication system based on Ku-band high-throughput satellite communication to meet these demands. Additionally, an emergency communication assurance solution that combines satellite technology with mobile 4G portable access stations is proposed, aiming to rapidly establish public 4G signal coverage in emergency response scenarios. The paper also introduces a lightweight power emergency communication prototype and thoroughly assesses its network functionality, performance, and support for emergency repair operations. Through field testing and real-world verification, the results demonstrate that this system offers a communication coverage radius exceeding 1.4 km. For individual users, the downlink speed reaches 15 Mbps, while the uplink speed achieves 8 Mbps. It effectively establishes public 4G signal coverage, ensuring clear and smooth video transmission, normal mobile dialing and call functions, and uninterrupted voice communication. This system efficiently and conveniently meets the requirements for emergency power communication assurance, delivering significant social and economic benefits.