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Broadcast and multicast represent a key opportunity in 5G for the massive consumption of multimedia services in the near future. These technologies permit to offload an important portion of this traffic in peak demand scenarios where users are consuming parallel content. An initial specification of 5G New Radio (NR) Rel15 was delivered in December 2017 and the final version will be published in June this year. However, 3GPP has not yet defined any broadcast/multicast solution for Rel15 NR, although some proposals will be revisited as soon as time units in Rel16 become available. In this work, we analyse the use of a mixed mode that shares multicast, broadcast and unicast resources via the same physical channel. This technology, as well as its LTE counterpart, is evaluated through link level air interface and subsequently system level simulations, providing an objective insight roads to MBMS provision in 5G NR.

In this article, we articulate the technical challenges to enable a future AR/VR end-to-end architecture, that combines 5G URLLC and Tactile IoT technology to support this next generation of interconnected AR/VR applications. Through the use of IoT sensors and actuators, AR/VR applications will be aware of the environmental and user context, supporting human-centric adaptations of the application logic, and lifelike interactions with the virtual environment. We present potential use cases and the required technological building blocks. For each of them, we delve into the current state of the art and challenges that need to be addressed before the dream of remote AR/VR interaction can become reality.

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