Reconfigurable optical star network architecture for multicast media production data centres Abstract   Passive optical star networks have attractive properties for multicast traffic in data centres, but are limited in transmission bandwidth per node due to sharing a finite total throughput capacity. By adding reconfigurable switching elements to the core of an optical star topology, simulations show that the expected transmission rate per node can be increased by 26xe2x80x9340% (at 90% and 70% network load respectively). The proposed architecture shows no loss of multicast functionality compared to a single passive optical star, and only 7.1% increase in power consumption. Network throughput is shown to be highly dependent on the network traffic pattern, with simulations of multicast zonal media production traffic showing 6 times greater throughput than random or hotspot traffic models.

A Survey of Multicast Communication in Optical NetworkonChip (ONoC). Optical NetworkonChip (ONoC) is an emerging chiplevel optical interconnection technology to realise highperformance and powerefficient intercore communication for manycore processors. For onchip networks, multicast communication is an important communication pattern, which is not only widely used in parallel computing applications in Chip MultiProcessors (CMPs), but also commonly adopted in emerging areas such as neuromorphic computing. However, the optimisation of multicast communication in an ONoC is not well studied and there is a significant room to improve the performance. In this paper, we present a comprehensive survey of the multicast communication in an ONoC, covering the development of both architecture design and networking design as well as our recent research outcomes. Moreover, we propose the design challenges and future research directions for optimising multicast in an ONoC, which can provide guidance and insight for the future researchers and chip developers.