Integrated Sensing and Communications: Toward Dual-Functional Wireless Networks for 6G and Beyond
Integrated Sensing and Communications: Toward Dual-Functional Wireless Networks for 6G and Beyond
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DOI：
10.1109/jsac.2022.3156632
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发表时间：
2022-06-01
影响因子：
16.4
通讯作者：
Buzzi, Stefano
中科院分区：
文献类型：
--
作者：
Liu, Fan;Cui, Yuanhao;Buzzi, Stefano
随着5G巩固的标准化，研究人员正在猜测什么是6G。传感功能的集成是成为6G无线电访问网络（RAN）的关键特征，从而允许开发密集的单元基础架构来构建感知性网络。在此IEEE杂志上，有关通信（JSAC）特刊概述的选定领域，我们对集成感应和通信（ISAC）的背景，关键应用程序和最新方法（ISAC）提供了全面的审查。我们从历史的角度讨论感应与通信（S＆C）之间的相互作用开始，然后考虑ISAC的多个方面以及由此产生的绩效提高。通过引入正在进行的用例和潜在用例，我们阐明了与ISAC相关的工业进步和标准化活动。我们分析了S＆C之间的许多性能权衡，从信息理论限制到物理层绩效折衷以及跨层设计权衡。接下来，我们讨论ISAC的信号处理方面，即ISAC波形设计并接收信号处理。更进一步，我们提供了关于在感知网络框架内S＆C之间更深层次的整合的愿景，在这些框架内，这两个功能有望相互协助，即通过通信辅助感应和传感辅助通信。最后，我们确定了ISAC与其他新兴通信技术的潜在集成，以及它们对无线网络未来的积极影响。
As the standardization of 5G solidifies, researchers are speculating what 6G will be. The integration of sensing functionality is emerging as a key feature of the 6G Radio Access Network (RAN), allowing for the exploitation of dense cell infrastructures to construct a perceptive network. In this IEEE Journal on Selected Areas in Communications (JSAC) Special Issue overview, we provide a comprehensive review on the background, range of key applications and state-of-the-art approaches of Integrated Sensing and Communications (ISAC). We commence by discussing the interplay between sensing and communications (S&C) from a historical point of view, and then consider the multiple facets of ISAC and the resulting performance gains. By introducing both ongoing and potential use cases, we shed light on the industrial progress and standardization activities related to ISAC. We analyze a number of performance tradeoffs between S&C, spanning from information theoretical limits to physical layer performance tradeoffs, and the cross-layer design tradeoffs. Next, we discuss the signal processing aspects of ISAC, namely ISAC waveform design and receive signal processing. As a step further, we provide our vision on the deeper integration between S&C within the framework of perceptive networks, where the two functionalities are expected to mutually assist each other, i.e., via communication-assisted sensing and sensing-assisted communications. Finally, we identify the potential integration of ISAC with other emerging communication technologies, and their positive impacts on the future of wireless networks.