In this letter, we design a downlink multi-user communication framework based on Rate-Splitting Multiple Access (RSMA) for semantic-aware networks. First, we formulate an optimization problem to obtain the optimal user scheduling, precoding, and power allocation schemes jointly. We consider the metric Age of Incorrect Information (AoII) in the objective function of the formulated problem to maximize the freshness of the overall information to be transmitted. Using big-M and Successive Convex Approximation (SCA) methods, we convert the resulting non-convex problem with conditional objective and constraints into a convex one and propose an iterative algorithm to solve it. By numerical results, we show that RSMA achieves a lower AoII than SDMA owing to its superior performance under multi-user interference.

翻译：本文设计了一种基于速率分割多址接入（RSMA）的下行多用户通信框架，用于语义感知网络。首先，我们构建了一个优化问题以联合优化用户调度、预编码和功率分配方案。在目标函数中引入不准确信息时效性（AoII）指标，以最大化待传输整体信息的新鲜度。通过采用大M法和逐次凸近似（SCA）方法，我们将带有条件目标与约束的非凸问题转化为凸问题，并提出一种迭代算法进行求解。数值结果表明，由于RSMA在多用户干扰下表现更优，其实现的AoII低于SDMA。