Resilient Connectivity of Remotely Deployed Mobile Internet of Things Devices
Enabling the Internet of Things in remote environments without traditional communication infrastructure requires a multi-layer network architecture. Devices in the overlay network such as unmanned aerial vehicles (UAVs) are required to provide coverage to underlay devices as well as remain connected to other overlay devices to exploit device-to-device (D2D) communication. The coordination, planning, and design of such overlay networks constrained by the underlay devices is a challenging problem. Existing frameworks for placement of UAVs do not consider the lack of backhaul connectivity and the need for D2D communication. Furthermore, they ignore the dynamical aspects of connectivity in such networks which presents additional challenges. For instance, the connectivity of devices can be affected by changes in the network, e.g., the mobility of underlay devices or unavailability of overlay devices due to failure or adversarial attacks. To this end, this work proposes a feedback based adaptive, self-configurable, and resilient framework for the overlay network that cognitively adapts to the changes in the network to provide reliable connectivity between spatially dispersed smart devices. Results show that the proposed framework requires significantly lower number of aerial base stations to provide higher coverage and connectivity to remotely deployed mobile devices as compared to existing approaches.
Fig. An example of two connected MAPs serving the underlying MSDs. The communication range of each MAP is depicted by the dotted lines while the area of influence is represented by the shaded circles.
Example run of the cognitive algorithm showing MAP configuration over time.
A random MAP failure event is induced making 20% of the MAPs unavailable. The cognitive framework adaptively re-configures itself to improve network connectivity.
A random MAP failure event is induced making 40% of the MAPs unavailable. The cognitive framework adaptively re-configures itself to improve network connectivity.
Top View of MAP configuration over time
Adaptation of overlay network with coordinated motion of underlay devices