Guildford Facility
The first phase of the Guildford deployment is the creation of a Smart environment based on an indoor deployment of the testbed in the Centre for Communication Systems Research. It will serve as initial core and experimental micro-cosmos of the envisioned Smart Campus facility.
The IoT node tier will consist of 250 freely programmable sensor nodes deployed across all offices of CCSR with various sensing modalities (temperature, light, noise, motion, electricity consumption of attached devices, vibration). The availability of these sensing modalities may vary across some of the nodes. The IoT nodes will consist of 200 TelosB based platforms and about 50 SunSpots. The deployment of the nodes currently stretching over two floors of the building. Figure 1 shows the current deployment snapshot as an example of the deployment topology. As the Phase 1 deployment is not yet finalized the final layout will vary.
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| Figure 1: An overview of the current IoT node deployment snapshot on two floors of CCSR. | ||
100 embedded Linux servers (GuruPlug Servers), directly connected to an Ethernet backbone, are deployed collocated to the sensor node for their management while offering the possibility to act at the same time as data GW. A server cloud hosts the testbed management servers and allows the on-demand creation of other application servers and data management tools.
Figure 2 provides an overview of the network architecture of the Phase 1 deployment. All devices of the IoT tier are connected through a gateway tier to a back bone network were application servers and testbed management servers reside. The data plane of the testbed is realised via wireless links (highlighted in Blue) based on 802.15.4 which can be single/multi-hop between the IoT nodes towards the GW devices, and Ethernet of from the GW towards the servers in the backbone network. An out-of band testbed management and control plane is realised via USB infrastructure from the IoT nodes to the GW devices, which in turn are connected through an Ethernet backbone towards the testbed management servers. In addition the testbed allows the connection of Smart Displays and end user terminals (laptops, desktops or mobiles) via WiFi and Ethernet towards the internal network, or directly via Bluetooth to the GW devices.
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| Figure 2: High level network diagram for Guildford Phase 1 deployment |
The ratio of GW nodes to IoT nodes is between 1:1 to 1:4, depending on the number of IoT nodes that are deployed in a room and availability of Ethernet ports in the office space for the connection of GWs.
