Joint Optimization of Task Splitting and Cell-Free MIMO Transmission for Multi-Tier Computing Systems

Multi-tier computing employing computation of-floading to edge servers (ESs) or cloud servers (CSs) offers a solution for challenges for intensive tasks at mobile devices having limited computing resources. We tackle a joint design to minimize completion time, dividing tasks into subtasks processed by local servers, ESs, and CSs. We jointly optimize task splitting ratios and transmission strategies. Numerical results confirm the effectiveness of the proposed multi-tier computing systems.