  In this paper, we address the networking and communications problems of
creating a digital copy in the Metaverse digital twin. Specifically, a virtual
service provider (VSP) which is responsible for creating and rendering the
Metaverse, is required to use the data collected by IoT devices to create the
virtual copy of the physical world. However, due to the huge volume of the
collected data by IoT devices (e.g., images and videos) and the limited
bandwidth, the VSP might become unable to retrieve all the required data from
the physical world. Furthermore, the Metaverse needs fast replication (e.g.,
rendering) of the digital copy adding more restrictions on the data
transmission delay. To solve the aforementioned challenges, we propose to equip
the IoT devices with semantic information extraction algorithms to minimize the
size of the transmitted data over the wireless channels. Since many IoT devices
will be interested to sell their semantic information to the VSP, we propose a
truthful reverse auction mechanism that helps the VSP select only IoT devices
that can improve the quality of its virtual copy of objects through the
semantic information. We conduct extensive simulations on a dataset that
contains synchronized camera and radar images, and show that our novel design
enables a fast replication of the digital copy with high accuracy.
