Non-terrestrial networks (NTNs) will complement terrestrial networks (TNs) in 5G and beyond, which can be attributed to recent deployment and standardization activities. Maximizing the efficiency of NTN communications is critical to unlock its full potential and reap its numerous benefits. One method to make communications more efficient is by the usage of multi-connectivity (MC), which allows a user to connect to multiple base stations simultaneously. It is standardized and widely used for TNs, but for MC to be used in the NTN environment, several challenges must be overcome. In this article, challenges related to MC in NTNs are discussed, and solutions to the identified challenges are proposed.

翻译：非地面网络（NTN）将补充5G及未来通信中的地面网络（TN），这得益于近期的部署与标准化活动。最大化NTN通信的效率对于释放其全部潜力并获取众多优势至关重要。提升通信效率的一种方法是采用多连接（MC）技术，该技术允许用户同时接入多个基站。MC已在TN中得到标准化并广泛使用，但要将其应用于NTN环境，仍需克服若干挑战。本文探讨了NTN中多连接技术面临的挑战，并针对已识别的问题提出了相应解决方案。