TinyOS 2.x supplies a well-designed single hop messaging layer for applications, but there is no standardized multihop framework. To address this issue, we surveyed a large number of applications [1] to determine the addressing techniques and messaging stack features used in sensor networks. From the results of this survey, we designed a multihop networking API [2] to address the needs of appli...

Due to their embedding into an unknown environment, wireless sensor networks are susceptible to adverse environmental conditions. A prime example is external interference, typically caused by 802.11, electric devices or co-located sensor networks, which can drastically influence communication performance. However, radios on sensor nodes provide multiple channels, which can help to alleviate int...

Since September, Sören Finster (Fig. 1) is a memeber of the institute of telematics. In context of the E-Energy project MEREGIO he is studying distributed approaches for information and communication technology in future energy systems. He wrote his diploma thesis at the system architecture group with the topic “Design and Implementation of Energy Containers in TinyOS” at University of Karlsruhe.

This TEP proposes a hardware abstraction for analog-to-digital converters (ADCs) in TinyOS 2.x, which is aligned to the three-layer Hardware Abstraction Architecture (HAA) specified in [TEP2]. It describes some design principles and documents the set of hardware-independent interfaces to an ADC.

Software for embedded microcontroller units (MCUs) represents both an interesting opportunity and a difficult challenge for compiler optimization. Since these systems tend to be small—often limited to a few KB of on-chip RAM—highly aggressive techniques are feasible and worthwhile. On the other hand, the effectiveness of traditional dataflow analyses is limited by their inability to cope with i...

This thesis is focused on issues relating to the management of the operating systems in wireless sensor networks. It deals with the questions like: Why the management components are required in operating systems for sensor nodes? What services could be managed in the operating system for such platforms? What are the management constraints of sensor nodes? TinyOS is one of the mostly used operat...

The MTS420CC board by Crossbow Technology, Inc. is a sensor module containing—among other sensors— a GPS receiver. A TinyOS device driver for that receiver has been implemented on the IRIS series of motes. This report gives an overview over the driver’s implementation and gives some ideas for further development and for porting it to other mote architectures.

The growing integration of Wireless Sensor Networks (WSN) in industries and critical infrastructures requires capabilities beyond the limits of the existing development tools. The performance of WSN needs to be evaluated before deployment, either by on-site experiments or simulation. The on-site performance evaluation is time and cost consuming, cannot easily cover the full range of expected op...