Max-Min Fairness of Rate-Splitting Multiple Access With Finite Blocklength Communications

Rate-Splitting Multiple Access (RSMA) has emerged as a flexible and powerful framework for wireless networks. In this paper, we investigate the user fairness of downlink multi-antenna RSMA in short-packet communications with/without cooperative (user-relaying) transmission. We design optimal time allocation linear precoders that maximize Max-Min Fairness (MMF) rate with Finite Blocklength (FBL) constraints. The relation between MMF blocklength, well impact transmission are investigated. Numerical results demonstrate can achieve same Non-Orthogonal (NOMA) Space Division (SDMA) smaller blocklengths (and therefore lower latency), especially deployment. Hence, conclude is promising multiple access guaranteeing low-latency communications.