Multi-UAV Content Caching Strategy and Cooperative, Complementary Content Transmission Based on Coalition Formation...

Area of Science:

• Wireless Communication Networks
• Content Caching
• Network Optimization

Background:

• Increasing demand for video and picture content strains wireless networks.
• Unmanned Aerial Vehicle (UAV)-aided small cells offer a solution for backhaul alleviation and flexible coverage.
• Limitations in UAV battery life and caching capacity necessitate advanced strategies.

Purpose of the Study:

• To develop a joint multi-UAV content-caching and cooperative transmission strategy.
• To address the challenges posed by limited UAV resources.
• To maximize overall network utility through efficient content delivery.

Main Methods:

• User clustering based on content preference and location similarity.
• Modeling cooperative, complementary content transmission as a coalition formation game (CFG).
• Developing algorithms for multi-UAV content caching and transmission.

Main Results:

• A user-clustering-based caching strategy was designed.
• A coalition formation game (CFG) was used to model cooperative transmission.
• Numerical simulations demonstrated the effectiveness of the proposed algorithms.

Conclusions:

• The proposed multi-UAV strategy effectively manages content caching and transmission.
• Cooperative strategies enhance network performance and user experience.
• The approach provides a viable solution for content delivery challenges in wireless networks.