A user cache management and cooperative transmission mechanism based on edge community computing in opportunistic social networks

Abstract

Abstract With the advent of the 5G era, people's demand for information and bandwidth is increasing. The signal source will mainly be high‐frequency radio waves with high bandwidth. However, the coverage of high‐frequency radio waves is very limited, which leads to the emergence of micro base stations. Opportunistic social networks are just suitable for this new transmission method, it is easy for users to simultaneously request content with high popularity in a short time, which will cause a heavy load on the micro base station and a high transmission delay. This paper establishes the community mechanism and proposes a user cache management and cooperative transmission mechanism (CMCT) based on edge community computing by using the predictability of users' requests for popular content. The free user equipment space is used to manage cache distribution through the edge community computing to perform cooperative transmission, thereby reducing the content delivery delay and the load of the micro base station. Simulation experiments show that the CMCT algorithm can reduce end‐to‐end delay and overhead, and improve data transmission efficiency.