Toward Truly Immersive HolographicType Communication: Challenges and Solutions With significant advances in holographic display technology, a plethora of interactive applications, such as teleconferencing and telesurgery, are well on their way to integrating holographic technologies. However, hologrambased applications will place significant demands on networking infrastructure, which are not supported today. These include support for ultralow delays, high bandwidth, and the ability to coordinate, synchronize, and dynamically adapt multiple data streams. This article articulates these challenges and points out gaps in existing networks that solutions must address. In addition, it provides an experimental analysis of novel network architectures that address one of these challenges, namely the ability to dynamically set up new flows with very low latency incurred by the first packet.

Efficient 3D Reconstruction and Streaming for GroupScale Multiclient Live Telepresence Sharing live telepresence experiences for teleconferencing or remote collaboration receives increasing interest with the recent progress in capturing and ARVR technology. Whereas impressive telepresence systems have been proposed on top of onthefly scene capture, data transmission and visualization, these systems are restricted to the immersion of single or up to a low number of users into the respective scenarios. In this paper, we direct our attention on immersing significantly larger groups of people into livecaptured scenes as required in education, entertainment or collaboration scenarios. For this purpose, rather than abandoning previous approaches, we present a range of optimizations of the involved reconstruction and streaming components that allow the immersion of a group of more than 24 users within the same scene  which is about a factor of 6 higher than in previous work  without introducing further latency or changing the involved consumer hardware setup. We demonstrate that our optimized system is capable of generating highquality scene reconstructions as well as providing an immersive viewing experience to a large group of people within these livecaptured scenes.