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Poster Abstract: Distributed Protocol Stacks for Wireless Sensor Networks
... COMPARISON OF CODE SIZE (FLASH) AND RAM USAGE [1] AND[2]. ...
In this paper, a model is proposed, in which neighbouring nodes share layers of their communications stack
with each other in a cooperative fashion to enable the use of IPv6 on each node without the need to include the stack’s full programming logic on each node, while still preserving transparent IP interconnectivity by forming a Distributed Protocol Stack (DPS). We give an overview on the concept behind DPS, a first protocol specification and evaluate our prototype implementation on the iSense WSN platform against a native IPv6 implementation regarding code size, memory usage and round-trip time.
This paper is based on two fundamental assumptions about a future Internet of Things (IoT): i) The amount of wireless, resource-constrained devices will outnumber the amount of devices in the current internet by several orders of magnitude and ii) those devices will be connected to the Internet over multi-hop wireless links. We argue that the experimental validation in testbeds is imperative to make those networks robust. However, there are only limited means to support researchers in "debugging" the actual communication on the wireless medium and often developers can only guess why their protocols don't work in a given environment. In this paper, we present such a framework which extends the WISEBED testbed federation. Our contribution allows an easy-to-use browser-based experimentation and evaluation of wireless multi-hop protocols in all WISEBED-compatible testbeds (nine testbeds with 1000 sensor nodes and the SmartSantander [17] smart city testbed which will offer up to 20,000 IoT devices). Using a generic packet tracking framework for multiple platforms, researchers can easily detect hotspots and bottlenecks in the network and follow the routes of individual packets as they are forwarded. Experiment configurations can be shared on the web so that experiments can easily be repeated to verify published results. We demonstrate the usability of our approach by means of a real-world use-case.
Standardized protocols such as IPv6 and 6LoWPAN allow the operation of heterogeneous wireless sensor network (WSN). However, many existing IPv6 implementations increase the code size requirements to an extent, which makes the deployment of these applications on more constrained devices impossible. To solve this problem, we proposed the concept of Distributed Protocol Stacks (DPS) in an earlier publication, which allows the sharing of protocol implementations between neighbouring nodes. In this paper, we describe and evaluate several extensions to this concept, which enable the use of DPS in large WSN deployments with changing network topologies. This includes mechanisms for the dynamic establishment of DPS connections at runtime in which nodes select their communication partners based on selected node properties (such as power source or duty cycle) and the monitoring and re-establishment of these connections. We evaluate the performance of the proposed extensions using a real world deployment of the DPS protocol using 43 nodes from the Wise bed test bed.
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