6G:跨频段协同通信

6G:Collaborative Communication Across Multiple Frequencies

在5G时代,移动通信首次引入毫米波。在频谱资源有限的条件下,跨频段协同无线组网的概念被提出。6G将面临更大的网络容量和更高的传输速率挑战,因此需要高效利用全频谱资源来满足不同的应用需求。以毫米波为代表的高频频率资源丰富,而以6 GHz以下的频率容易实现有效覆盖。高低频紧密结合的跨频段协同无线通信(COCAMF)应运而生。这种结合能够充分发挥高低频的优势。但是,高低频之间存在电波传播特性、射频(RF)前端性能等差异性,这使得COCAMF面临诸多挑战。认为需要充分探究COCAMF所面临的信道模型、射频前端、无线传输和无线组网技术方案等方面的难题,以推动6G COCAMF系统标准化和产品研发进程。

The millimeter-wave band was firstly introduced into the mobile communication system in the 5G era.And the wireless networking across multiple frequency bands was proposed in the case of limited frequency spectrum resources.A larger network capacity and a higher transmission rate are required for the 6G that demands efficient usage of full spectrum resources to meet diversified application requirements.Taking millimeter-wave as an example,a lot of spectrum resources are available in the high band,while more effective coverage is feasible in the low band,e.g.,Sub-6 GHz.The collaborative communication across multiple frequencies(COCAMF)is emerging to exploit their respective merits.But the COCAMF also faces heterogeneities of propagation characteristics and performances of radiofrequency(RF)fronts.Channel models,RF fronts,wireless transmission and networking,and other problems should be intensively investigated to promote standardization and product development of the COCAMF.