Resource Allocation for URLLC Service in Relay-Assisted Smart Grid System

Ultra-reliable low-latency communication (URLLC) is an important technology to support intelligent distributed automation and power load demand side response services in the smart grid system. To further enhance the URLLC requirements of the smart grid, this paper considers a downlink relay-assisted system to deliver control information. We aim to jointly optimize the bandwidth allocation and transmit power of the source and relay base stations (BS) to maximize the minimum rate of URLLC users. The achievable data rate under the finite blocklength regime is adopted. A convex approximation based iterative algorithm is proposed to solve this problem. Simulation results show that the proposed algorithm has better performance compared with the existing algorithms.