Superposition Coding in Cell-Free Massive MIMO with the Coexistence of eMBB and URLLC

• Published in: 2023 IEEE Globecom Workshops (GC Wkshps) pp. 1511 - 1516
• Main Authors: Liu, Luyang, Wu, Shaochuan, Ma, Yongkui
• Format: Conference Proceeding
• Language: English
• Published: IEEE 04.12.2023
• Subjects: Admission control; Cell-Free Massive MIMO (CF-mMIMO); enhanced mobile broadband (eMBB); Finite blocklength theory (FBL); Heuristic algorithms; Interference; Massive MIMO; Power control; Superposition coding (SPC); Ultra reliable low latency communication; Ultra-reliable and low-latency communication (URLLC); Wireless communication
• DOI: 10.1109/GCWkshps58843.2023.10465090

Superposition coding (SPC) is considered as an alternative downlink coexistence strategy for mitigating inter-service interference, however, such approach necessitates the receiver's ability to detect the presence of unwanted transmissions. As a highly promising wireless technology, Cell-Free Massive MIMO (CF-mMIMO) has the ability to eliminate a significant portion of interference between users through its spatial separation capability, facilitating the implementation of SPC. In this paper, SPC is adopted to reduce the loss of eMBB throughput, the short packet transmission is adopted for URLLC to meet the low latency and reliability requirement. We present a user admission control scheme to implement SPC over different power control schemes. Numerical results demonstrate our proposed resource reallocation scheme caused by SPC on the coexistence between eMBB and URLLC users is superior to other comparisons in terms of eMBB reliability and throughput while meeting URLLC service requirements.