tinyDSM: A highly reliable cooperative data storage for Wireless Sensor Networks

Abstract

The advantage of a Wireless Sensor Network (WSN) compared to a centric approach is the distribution of sensing suites. However, in order for such a system of distributed resources to work in a reliable and effective way a smart cooperation between nodes is needed. In this paper we propose a middleware approach for a highly reliable data storage that helps to assure data availability despite the well known WSN resource problems and disappearing or inactive nodes by providing a reasonable data redundancy in the system. Such a solution helps to ease the design and optimization of the data exchange between nodes as well. Our solution is configurable in order to satisfy the needs of the application on top regarding performance/requirements trade-off. The options specify the quantity and quality of the data replication. Additional features like event mechanism that monitors the data and the possibility to issue database like queries increase the applicability of our middleware. In this paper we focus on the evaluation of its capabilities regarding reliability, the consistency of replicates and the costs of the data management. The simulation results for a reasonable set-up show that the CPU load caused by the data replication is low (below 3 percent) and the average inconsistency time is as small as about 0,06 seconds for a single hop and about 0,15 seconds for a two hops replication area. There is still room for improvements, but a clear definition of problems helps to find ways to cope with them in order to achieve the chosen goals.

A survey on fault tolerance in small and large scale wireless sensor networks

“…In [39], the authors presented a new method named TinyDSM (Tiny Distributed Shared Memory) that allows sensors to share their data in an application dependent manner. In fact, the TinyDSM is a middle-ware providing a way to perform reliable distributed data storage.…”

Energy and Memory Efficient Data Loss Prevention in Wireless Sensor Networks

“…Tiny Distributed Shared Memory (TinyDSM) [17] is a reliable DDS mechanism which tries to replicate the data in some nodes along the path between the sink and the source. According to this method, each node along the query propagation path, which contains the replicated data, will answer the query directly.…”

Building and Orchestrating Centralized Remote Management Procedures for Wireless Sensor Networks

“…The function is influenced by critical parameters such as the number of desired replicas, the remaining energy of a replicator node, and the energy of the neighbors of the replicator node. In TinyDSM [5], a reactive replication approach is discussed. Data bursts are broadcast by a source node and then handled independently by each neighbor, which decides whether to store a copy of the burst or not.…”

“…Although distributed data storage and replication have been studied in the literature [4,5], there are still a number of challenges to tackle. First, to the best of our knowledge, most previous studies did not encompass both the distribution and the replication aspects.…”