Version Age of Information in Clustered Gossip Networks

We consider a network consisting of single source and $n$ receiver nodes that are grouped into equal-sized clusters. Each cluster corresponds to distinct community such belong different communities cannot exchange information. use dedicated heads in each facilitate communication between the within cluster. Inside clusters, connected other according given topology. Based on connectivity levels node relays its current stored version update neighboring by local gossiping. disconnected, ring, fully topologies for For these topologies, we characterize average age at find scaling as function size . Next, allowing gossiping among heads, improve nodes. Then, focusing ring topology cluster, introduce hierarchy considered clustered gossip model without using heads. Finally, age-optimum sizes source, head, rates through numerical evaluations.