This Recommendation is as the subsequent Recommendation of ITU-T F.746.14, specifies the functional architecture of cloud virtual reality systems. It describes the overall functional architecture including control layer, resource layer, network layer, terminal layer, OA&M and security. This Recommendation also describes the basic functions of each layer, such as by unified scheduling/technology integration/content distribution of the control layer, cloud-based operation on the resource layer and high-quality transmission by the network layer, the cloud VR content can be run concurrently based on the cloud and is distributed to the terminal for presentation.