Immersive technologies such as virtual reality (VR), augmented reality (AR), and holograms will change users' digital experience. These immersive technologies have a multitude of applications, including telesurgeries, teleconferencing, Internet shopping, computer games, etc. Holographic-type communication (HTC) is a type of augmented reality media that provides an immersive experience to Internet users. However, HTC has different characteristics and network requirements, and the existing network architecture and transport protocols may not be able to cope with the stringent network requirements of HTC. Therefore, in this paper, we provide an in-depth and critical study of the transport protocols for HTC. We also discuss the characteristics and the network requirements for HTC. Based on the performance evaluation of the existing transport protocols, we propose a roadmap to design new high-performance transport protocols for immersive applications.

翻译：沉浸式技术（如虚拟现实、增强现实和全息影像）将改变用户的数字体验。这些沉浸式技术在远程手术、远程会议、互联网购物、电脑游戏等多个领域具有广泛应用。全息通信是一种增强现实媒体类型，可为互联网用户提供沉浸式体验。然而，全息通信具有不同的特性和网络需求，现有网络架构和传输协议可能无法应对其严苛的网络要求。因此，本文对全息通信的传输协议进行了深入且批判性的研究。我们同时探讨了全息通信的特征与网络需求。基于现有传输协议的性能评估，我们提出了一条为沉浸式应用设计新型高性能传输协议的路线图。