Wi-SUN deployments can extend the basic architecture models with additional topologies that improve scalability, resilience, or coverage. These topology variations modify how multiple Border Routers and meshes interact while preserving the same upstream integration model.
Unlike the Translated, Bridged, or Routed models, these topologies do not change how the network connects to the upstream infrastructure. Instead, they describe how the Wi-SUN mesh itself is structured internally or across multiple sites.
Common topology variations include:
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Multi-Border Router (Multi-Root): Multiple active Border Routers operate in the same region to create a Field Area Network (FAN), providing redundancy, load balancing, and wider coverage.
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Segmented or hierarchical meshes: Divide large deployments into regional Wi-SUN subnets, each managed by its own Border Router.
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Dual-homed or hybrid backhaul: A single Border Router connects to multiple upstream networks (e.g., Ethernet and cellular) to provide redundancy or traffic separation.
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Multi-PAN environments: Multiple independent Wi-SUN networks coexist within the same area, each with its own Border Router.
These designs add flexibility for complex or large-scale deployments and complement the core Wi-SUN architecture models. You can also combine multiple topologies to meet the specific reliability, capacity, or geographic needs of your deployment.
