Semantic Communication (SC) is a novel paradigm for data transmission in 6G. However, there are several challenges posed when performing SC in 3D scenarios: 1) 3D semantic extraction; 2) Latent semantic redundancy; and 3) Uncertain channel estimation. To address these issues, we propose a Generative AI Model assisted 3D SC (GAM-3DSC) system. Firstly, we introduce a 3D Semantic Extractor (3DSE), which employs generative AI models, including Segment Anything Model (SAM) and Neural Radiance Field (NeRF), to extract key semantics from a 3D scenario based on user requirements. The extracted 3D semantics are represented as multi-perspective images of the goal-oriented 3D object. Then, we present an Adaptive Semantic Compression Model (ASCM) for encoding these multi-perspective images, in which we use a semantic encoder with two output heads to perform semantic encoding and mask redundant semantics in the latent semantic space, respectively. Next, we design a conditional Generative adversarial network and Diffusion model aided-Channel Estimation (GDCE) to estimate and refine the Channel State Information (CSI) of physical channels. Finally, simulation results demonstrate the advantages of the proposed GAM-3DSC system in effectively transmitting the goal-oriented 3D scenario.

Technology has always had a significant impact on supply chains. In 2023, it is going to be more important than ever as the "Great Supply Chain Disruption" continues to challenge organisations around the world, according to SAPICS (The Professional Body for Supply Chain Management in Southern Africa). War, raw materials shortages, rising energy costs and extreme weather conditions are just some of the factors that will disrupt global supply chains in 2023, warns the non-profit organisation that aims to elevate, educate and empower the community of supply chain professionals across Africa. "In South Africa, the electricity crisis will continue to challenge businesses across all sectors. The negative impact on energy-intensive and irrigation dependent agricultural industries in particular will resonate through the entire supply chain – from the farm to consumers, who will have to pay more and have fewer competitive options available on supermarket shelves," says SAPICS president MJ Schoemaker.