Joint Uplink-Downlink Resource Allocation for OFDMA-URLLC MEC Systems

by   Walid R. Ghanem, et al.

In this paper, we study resource allocation algorithm design for multiuser orthogonal frequency division multiple access (OFDMA) ultra-reliable low latency communication (URLLC) in mobile edge computing (MEC) systems. To achieve the stringent end-to-end delay and reliability requirements of URLLC MEC systems, we propose joint uplink-downlink resource allocation and finite blocklength transmission. Furthermore, we propose a partial time overlap between the uplink and downlink frames to minimize the end-to-end delay, which introduces new time causality constraints. Then, the proposed resource allocation algorithm is formulated as an optimization problem for minimization of the total weighted transmit power of the network under constraints on the minimum quality-of-service regarding the number of computed URLLC user bits within the maximum allowable computing time, i.e., the end-to-end delay of a computation task. Due to the non-convexity of the optimization problem, finding the globally optimal solution entails a high computational complexity which is not tolerable for real-time applications. Therefore, a low-complexity algorithm based on successive convex approximation is proposed to find a high-quality sub-optimal solution. Our simulation results show that the proposed resource allocation algorithm design facilitates the application of URLLC in MEC systems, and yields significant power savings compared to a benchmark scheme.


Optimal Resource Allocation for Multi-user OFDMA-URLLC MEC Systems

In this paper, we study resource allocation algorithm design for multi-u...

Resource Allocation for Secure Multi-User Downlink MISO-URLLC Systems

In this paper, we study resource allocation algorithm design for secure ...

2D Proactive Uplink Resource Allocation Algorithm for Event Based MTC Applications

We propose a two dimension (2D) proactive uplink resource allocation (2D...

Joint Uplink and Downlink Resource Configuration for Ultra-reliable and Low-latency Communications

Supporting ultra-reliable and low-latency communications (URLLC) is one ...

Joint Beamforming and Phase Shift Optimization for Multicell IRS-aided OFDMA-URLLC Systems

This paper investigates the resource allocation algorithm design for int...

Optimal Resource Allocation with Delay Guarantees for Network Slicing in Disaggregated RAN

In this article, we propose a novel formulation for the resource allocat...

Please sign up or login with your details

Forgot password? Click here to reset