Patent ID: 11949754
Assignee: FOUNDATION OF SOONGSIL UNIVERSITY INDUSTRY COOPERATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. A content caching optimization system comprising:
a producer terminal configured to generate and provide content;
a user terminal configured to transmit a content request according to a user and receive content according to the content request;
a mobile/multiple access edge computing device (MEC) configured to predict the number of requests for each content to be requested later based on the content request received from the user terminal; and
a software-defined network (SDN) controller comprising a processor configured to calculate a content popularity using the number of requests for each content predicted by the MEC and perform content caching optimization based on the calculated content popularity and a preset content priority,
wherein the SDN controller:
aggregates the number of requests for each content received from the MEC for a preset input time;
calculates a content popularity by normalizing the aggregated number of requests for each content;
calculates an optimal solution based on the content popularity and the content priority using a binary particle swarm optimization (BPSO) algorithm, wherein the optimal solution is calculated using an objective function that is redefined through a penalty function of different constraints including a quality of experience (QoE) constraint that is an average content transmission cost to be satisfied according to the content priority;
derives a content caching state for minimizing a cost of transmitting the content by performing the content caching optimization using the calculated optimal solution; and
transmits the content caching state to the MEC device;
wherein the MEC device:
upon receiving the content caching state, implements an information-centric networking (ICN)-based caching is based on the content caching state.