Virtual broking coding for reliable in-network storage on WSANs

Abstract

The emerging Internet of Things (IoT) paradigm makes Wireless Sensor and Actuator Networks (WSANs) seem as a central element for data production and consumption. In this realm, where data are produced and consumed within the network, WSANs have as a challenge to perform in-network data storage considering their resource shortage. In this paper, we propose the Virtual Broking Coding (VBC) as a data storage scheme compliant with WSANs constraints. As such, VBC ensures a reliable data storage and an efficient mechanism for data retrievability. To evaluate our proposed solution, we present a theoretical analysis as well as a simulation study. Using both, we show that VBC reduces the cost incurred by the coding techniques; and increases the delivery ratio of the requested data. The results presented by VBC suggest this solution as a new direction on how to use network coding based schemes to address the WSAN in-network storage problem.

Optimal Network Coding-Based In-Network Data Storage and Data Retrieval for IoT/WSNs

“…However, they consider that the storage nodes are all connected by cables, which does not suit all IoT practical scenarios. Nonetheless, they reinforce the result obtained by us in [10], which shows that using a structure that intermediate the access to the data is more efficient than caching the data at the source node and retrieving them through a directly communication between source and consumer nodes.…”

“…On the other hand, the works that perform in-network data storage do not assume the WSN integration in the IoT realm, [3]- [9]. In order to overcome this shortage we proposed in [10] an in-network data storage scheme called Virtual Broking Coding (VBC) that, although envisaged to an IoT scenario, was tested in the scenarios proposed in [21] for a fair comparison with its solution, the Balance Storage (BS). Both VBC and BS use a structure called Virtual Broker (VB) made up of Virtual Broker Nodes (VBNs) that intermediate the communication between the consumers and producers through the publish/subscribe model.…”

“…In this section we present the VBC scheme, as proposed in [10], and the communication model proposed here for its integration to the IoT realm.…”

“…Indeed, the several solutions found in the literature, such as in [3]- [9], do not take into account the new challenges and needs imposed by the integration of the WSN in IoT. In our previous work [10], we proposed, as a first attempt, an in-network data storage scheme called VBC that assumes an IoT-based application scenario in order to overcome this shortage.…”

“…In [10], we were mainly interested in how to store the data produced in the network and how to ensure a reliable data retrieval by any consumer in the network. For that, we proposed to store coded packets generated through a network coding technique that allowed VBC to store packets with some redundancy level.…”