Joel Höglund

Secure communication for the Internet of Things—a comparison of link‐layer security and IPsec for 6LoWPAN

The future Internet is an IPv6 network interconnecting traditional computers and a large number of smart objects. This Internet of Things (IoT) will be the foundation of many services and our daily ...

A framework for low-power IPv6 routing simulation, experimentation, and evaluation

A Framework for Low-Power IPv6 Routing Simulation, Experimentation, and Evaluation : Demo abstract

NOBEL – A Neighborhood Oriented Brokerage ELectricity and Monitoring System

Distributed generation of energy coming from various vendors, even private homes, is a big challenge for tomorrows power management systems that, unlike today, will not dispatch energy centrally or under central control. On the contrary, the production, distribution and management of energy will be treated and optimized in a distributed manner using local data. Even today, parts of the power system are highly nonlinear with fast changing dynamics. It is hard to predict disturbances and undertake countermeasures on time. In existing approaches electricity is distributed to the final users according to its expected estimated demand. Such non-dynamic approaches, are difficult to evolve and can not accommodate rapid changes in the system. By having a cross-layer and open information flow among the different actors involved we can make better and more timely predictions, and inject new dynamics in the system that will lead to better energy management and achieve better energy savings. The NOBEL project is building an energy brokerage system with which individual energy prosumers can communicate their energy needs directly to both large-scale and small-scale energy producers, thereby making energy use more efficient.

The Role of Overlay Services In a Self-Managing Framework for Dynamic Virtual Organizations

We combine and extend recent results in autonomic computing and structured peer-to-peer to build an infrastructure for constructing and managing dynamic virtual organizations. The paper focuses on the middle layer of the proposed infrastructure, in-between the Niche overlay system on the bottom, and an architecturebased management system based on Jade on the top. The middle layer, the overlay services, are responsible for all sensing and actuation carried out by the VO management. We describe in detail the API of the resource and component overlay services both on the management node and the nodes hosting resources. We present a simple use case demonstrating resource discovery, initial deployment, self-configuration as a result of resource availability change, self-healing, self-tuning and self-protection. The advantages of the design are 1) the overlay services are in themselves self-managing, and sensor/actuation services they provide are robust, 2) management can be dealt with declaratively and at a high-level, and 3) the overlay services provide good scalability in dynamic VOs.

Using a 6LoWPAN smart meter mesh network for event-driven monitoring of power quality

Power quality monitoring is one of the key issues of managing an electrical grid, which is becoming even more important with more distributed and more variable generation. Today expensive equipment allows monitoring of the power network at key points, but for cost reasons this can not reach the residential end-user. To prevent an excessive need for specialized monitoring hardware, e.g. network analysers, it is proposed to engage the capabilities of modern smart meters which can monitor and report power quality events (e.g. voltage deviations). Subsequently a grid operator can follow up with actions in an affected area in order to analyse problems e.g. by increasing the sampling rate. Although the smart meter precision is not comparable to the precision of a commercial network analyser, in large numbers distributed smart meters forming a mesh network can provide sufficient information for power quality in an area while keeping the monitoring overhead and the cost low. It is shown that by using modern interoperable wireless communication protocols and Internet services, the proposed system has a high degree of flexibility, and good potential for scalability and resilience. The preliminary evaluation shows that the smart metering infrastructure, if coupled with suitable information and communication tools, can offer innovative value-added services and enhance existing business processes.

Enabling Self-Management Of Component Based Distributed Applications

Deploying and managing distributed applications in dynamic Grid environments requires a high degree of autonomous management. Programming autonomous management in turn requires programming environm ...

Distributed Control Loop Patterns for Managing Distributed Applications

In this paper we discuss various control loop patterns for managing distributed applications with multiple control loops. We introduce a high-level framework, called DCMS, for developing, deploying and managing component-based distributed applications in dynamic environments. The control loops, and interactions among them, are illustrated in the context of a distributed self-managing storage service implemented using DCMS to achieve various self-* properties. Different control loops are used for different self-* behaviours, which illustrates one way to divide application management, which makes for both ease of development and for better scalability and robustness when managers are distributed. As the multiple control loops are not completely independent, we demonstrate different patterns to deal with the interaction and potential conflict between multiple managers.

Event-driven IPv6 communication for the smart grid infrastructure

There is a common understanding that we need to use energy in smarter and more efficient ways. In order to achieve increased energy efficiency for households there is a need to adjust energy consumption based on the dynamic needs of the people living there, and the available energy and costs at a specific time. Involved energy devices, such as electricity, gas and water meters, need to have a certain amount of “smartness” however without a common way to integrate them we risk ending up with a multitude of heterogeneous smart devices that need to be manually controlled one by one via device-specific interfaces and protocols. We believe that using IPv6 on every device is an important step towards creating a controllable and interoperable energy infrastructure. When every device can publish data and be directly addressed globally, real time monitoring and control becomes possible and more sophisticated as other parties can easily interact with it over Internet and integrate its functionality. Additionally the user is in control over which data to share, with whom and for what purpose (e.g. with the energy providers for billing), as well as which policy should be used when conditions change. In this demo we show how a Smart Home with an IPv6-equipped electricity smart meter prototype can report meter readings to cloud hosted business services, which collect readings from a number of meters, and can detect deviations from expected usage. In case of unexpected power shortage or surplus, the price is accordingly adjusted and the smart meters are informed. In the case of a price increase, it is up to the user to either pay the higher price, or to reduce her consumption (automatically based on their predefined policy). Similarly for a price drop, the user can choose to execute energy-hungry tasks. By allowing a energy gateway to control not only electricity but also other devices in the household infrastructure such as heating, the energy management can be made more efficient.