Jaime Jiménez

Gateway selection in capillary networks

The world is adopting machine-type communication, wherein sensors and actuators blend seamlessly with the environment around us, bringing a new ubiquitous computing and communication era - a shift that is, to some extent, illustrated by the explosive growth of the Internet of Things (IoT). Capillary Networks play an important role in the growth of IoT, enabling wireless sensor networks to connect and use the capabilities of cellular networks through Capillary Gateways. In that sense, Capillary Gateways facilitate the seamless integration of wireless sensor networks with cellular networks. Therefore, an optimal selection of the Capillary Gateways by the wireless sensor network is crucial for balancing the load between the gateways and optimizing the end-to-end path through both networks. This paper describes a set of possible gateway selection architectures and presents an algorithm for determining the gateway selection based on policies and a set of constraints. Then, the paper describes our implementation of two selected architectures, discussing the solutions and challenges encountered during implementation. Finally, the paper evaluates the traffic and load generated by gateway selection.

Enhancing Lightweight M2M Operations for Managing IoT Gateways

Heterogeneity in constrained networks and gateways is perhaps one of the single greatest challenges facing end-to-end management of devices and networks in the IoT. Today, the Lightweight M2M (LWM2M) protocol, leveraged on open Internet standards, has become a strong contender for REST-based IoT management. However, significant challenges exist for remote gateway management, particularly for proxies and exposing proprietary or vendor-specific operations. This paper presents some effective solutions in LWM2M for overcoming these challenges, using object modelling and linking. The presented approaches are also validated with prototypes.