The new concept of semi-integrated-sensing-and-communication (Semi-ISaC) is proposed for next-generation cellular networks. Compared to the state-of-the-art, where the total bandwidth is used for integrated sensing and communication (ISaC), the proposed Semi-ISaC framework provides more freedom as it allows that a portion of the bandwidth is exclusively used for either wireless communication or radar detection, while the rest is for ISaC transmission. To enhance the bandwidth efficiency (BE), we investigate the evolution of Semi-ISaC networks from orthogonal multiple access (OMA) to non-orthogonal multiple access (NOMA). First, we evaluate the performance of an OMA-based Semi-ISaC network. As for the communication signals, we investigate both the outage probability (OP) and the ergodic rate. As for the radar echoes, we characterize the ergodic radar estimation information rate (REIR). Then, we investigate the performance of a NOMA-based Semi-ISaC network, including the OP and the ergodic rate for communication signals and the ergodic REIR for radar echoes. The diversity gains of OP and the high signal-to-noise ratio (SNR) slopes of the ergodic REIR are also evaluated as insights. The analytical results indicate that: 1) Under a two-user NOMA-based Semi-ISaC scenario, the diversity order of the near-user is equal to the coefficient of the Nakagami-m fading channels (m), while that of the far-user is zero; and 2) The high-SNR slope for the ergodic REIR is based on the ratio of the radar signal's duty cycle to the pulse duration. Our simulation results show that: 1) Semi-ISaC has better channel capacity than the conventional ISaC; and 2) The NOMA-based Semi-ISaC has better channel capacity than the OMA-based Semi-ISaC.
翻译:为下一代蜂窝网络提出了半集成遥感和通信(Semi-ISaC)的新概念。与全带宽用于综合遥感和通信(ISaC)的先进工艺相比,拟议的Semi-ISaC框架提供了更大的自由,因为它允许部分带宽仅用于无线通信或雷达探测,而其余则用于ISaC传输。为了提高带宽效率(BE),我们调查了半-ISaC网络从正方位多重访问(OMA)到非直方位多重访问(NOMA)的演变情况。首先,我们评估了基于OMA的半地平流数据网络的性能。我们评估了OMIC的S-多端数据性能,同时,我们评估了OMA的S-直径直流数据(OMIS-IA)的性能,同时显示了SIMO-RIMA的性电路运量(O-RIMA-RIS)的性能,而O-S-MI的S-RISDRM(O-RIS-RIS)的性电路段的性电路路段能也显示了。