Delay tolerant networking for sensor networks,” Swedish

The Delay Tolerant Networking Architecture (DTN) has been proposed for use in challenged networks that suffer from intermittent connectivity or high delay. The DTN architecture and the bundle protocol presents a standard method to intercon-nect heterogeneous challenged networks using asynchronous message switching. It provides a framework for dynamic routing, contact scheduling, naming, relia-bility and transmission status reports. Wireless Sensor Networks (WSNs) are often viewed as challenged networks as nodes operate at low power, often with weak or intermittent radio communication. WSNs are an important application area for DTN. In this work I present ContikiDTN, a TCP/IP based prototype implementa-tion of the DTN architecture and bundle protocol. ContikiDTN aims to evaluate the suitability of the DTN bundle protocol as a solution for messaging inside a TCP/IP WSN and as a way of connecting the WSN to the Internet. I discuss the design and implementation of ContikiDTN using the Contiki operating system. I highlight the issues in implementing the bundle protocol with TCP and Contiki