Joint Beamforming and Offloading Design for Integrated Sensing, Communication and Computation System

TL;DR

This paper proposes a joint beamforming and offloading strategy for an integrated sensing, communication, and computation system, optimizing latency and sensing performance in a three-tier MEC framework.

Contribution

It introduces a novel joint optimization approach for beamforming and offloading in a three-tier ISCC system, improving latency and performance over existing two-tier models.

Findings

Proposed algorithm converges effectively.

Significant reduction in task execution latency.

Outperforms state-of-the-art two-tier frameworks.

Abstract

Mobile edge computing (MEC) is powerful to alleviate the heavy computing tasks in integrated sensing and communication (ISAC) systems. In this paper, we investigate joint beamforming and offloading design in a three-tier integrated sensing, communication and computation (ISCC) framework comprising one cloud server, multiple mobile edge servers, and multiple terminals. While executing sensing tasks, the user terminals can optionally offload sensing data to either MEC server or cloud servers. To minimize the execution latency, we jointly optimize the transmit beamforming matrices and offloading decision variables under the constraint of sensing performance. An alternating optimization algorithm based on multidimensional fractional programming is proposed to tackle the non-convex problem. Simulation results demonstrates the superiority of the proposed mechanism in terms of convergence and task execution latency reduction, compared with the state-of-the-art two-tier ISCC framework.