Joakim Eriksson

• Senior Researcher at RISE Research Institutes of Sweden

Contiki-NG (Next Generation) is an open source, cross-platform operating system for severely constrained wireless embedded devices. It focuses on dependable (reliable and secure) low-power communications and standardised protocols, such as 6LoWPAN, IPv6, 6TiSCH, RPL, and CoAP. Its primary aims are to (i) facilitate rapid prototyping and evaluation...

Flood disasters affect millions of people across the world by causing severe loss of life and colossal damage to prop- erty. Internet of Things (IoT) has been applied in areas such as flood prediction, flood monitoring, and flood detection. Although IoT technologies cannot stop the occurrence of flood disasters, they are an exceptionally valuable a...

Standard protocols for wireless IoT communication must be energy-efficient in order to prolong the lifetimes of IoT devices. Two energy-saving strategies for wireless communication are prevalent within the IoT domain: sleepy devices and radio duty cycling. In this paper, we conduct a comprehensive evaluation as to what types of application scenario...

A wide gap exists between the state of the art in developing Wireless Sensor Network (WSN) software and current practices concerning the design, execution, and maintenance of business processes. WSN software is most often developed based on low-level OS abstractions, whereas business process development leverages high-level languages and tools. Thi...

After a decade of research in low-power data collection, reaching arbitrary nodes has received comparatively little attention. The leading protocol for low-power IPv6 routing, RPL, is no exception, as it is often studied in multipoint-to-point scenarios. As a result, downward routing (from root to node) is still notoriously difficult, holding back...

The Internet of Things allows physical objects, sensors, and actuators to be connected to each other as well as cloud services. Over the past few years, advances in wireless protocols, software systems, and standardization for IPv6 points to a future where every physical object that can benefit from an Internet connection will be connected to the I...

The Internet of Things requires interoperability and low power consumption, but interoperability and low power consumption have thus far been mutually exclusive. This talk outlines the challenges in attaining low power operation for

Two-way time of flight (ToF) ranging is one of the most interesting approaches for localization in wireless sensor networking since previous ToF ranging approaches using commercial off-the-shelf (COTS) devices have achieved good accuracy. The COTS-based approaches were, however, evaluated only in line-of-sight conditions. In this paper, we extend T...

The industrial adoption of wireless sensor networks (WSNs) is hampered by two main factors. First, there is a lack of integration of WSNs with business process back-ends. Second, programming WSNs is still challenging as it is mainly performed at the operating system level. To this end, we provide makeSense – a unified programming framework and a co...

Interoperability is key to widespread adoption of sensor network technology, but interoperable systems have traditionally been difficult to develop and test. We demonstrate an interoperable system development and performance diagnosis environment in which different systems, different software, and different hardware can be simulated in a single net...

Interoperability is essential for the commercial adoption of wireless sensor networks. However, existing sensor network architectures have been developed in isolation and thus interoperability has not been a concern. Recently, IP has been proposed as a solution to the interoperability problem of low-power and lossy networks (LLNs), considering its...

Low-power networked devices, such as sensors and actuators, are becoming a vital part of our everyday infrastructure. Being networked, the continued development of these systems needs involvement from the networking community. We present a framework for simulation, experimentation, and evaluation of routing mechanisms for low-power IPv6 networking....

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 elec...

Low-power wireless networks are quickly becoming a critical part of our everyday infrastructure. Power con-sumption is a critical concern, but power measurement and estimation is a challenge. We present Powertrace, which to the best of our knowledge is the first system for network-level power profiling of low-power wireless systems. Powertrace uses...

Sensornet protocols periodically broadcast beacons for neighborhood information advertisement, but beacon transmissions are costly when power-saving radio duty cycling mechanisms are used. We show that piggybacking multiple beacons in a single transmission significantly reduces transmission costs and argue that this shows the need for a new layer i...

Power consumption is one of the most important factors in wireless sensor network research, but most simulators do not provide support for visualizing the power consumption of an entire sensor network. This makes it hard to develop, debug, and understand mechanisms and protocols based on power-saving mechanisms. We present Cooja TimeLine, an extens...

Wireless sensor networks for building automation and energy management has made great progress in recent years, but the inherent indoor radio range limitations can make communication unpredictable and system deployments difficult. Low-power radio can be combined with low-power Power-Line Communication (PLC) to extend the range and predictability of...

Low-power networked devices, such as sensors and actuators, are becoming a vital part of our everyday infrastructure. Being networked, the continued development of these systems needs involvement from the networking community. We present a framework for simulation, experimentation, and evaluation of routing mechanisms for low-power IPv6 networking....

We demonstrate low-power IP-based sensor networks by showing a system that interacts with the sensor network using a RESTful web service interface. The sensor data is displayed with overlaid D graphics on top of a live camera feed, so-called augmented reality. The augmented reality application is built with off-the-shelf components with no sensor n...

RPL is the IETF candidate standard for IPv6 routing in low-power wireless sensor networks. We present the first experimental results of RPL which we have obtained with our ContikiRPL implemen-tation. Our results show that Tmote Sky motes running IPv6 with RPL routing have a battery lifetime of years, while delivering 0.6 packets per second to a sin...

Many sensor network protocols are self-configuring, but independent self-configuration at different layers often results in suboptimal performance. We present Chi, a full-system configuration architecture that separates system logic from system configuration. Drawing from concepts in artificial intelligence, Chi allows full-system configuration tha...

RPL is the IETF candidate standard for IPv6 routing in low-power wireless sensor networks. We present the first experimental results of RPL which we have obtained with our ContikiRPL implementation. Our results show that Tmote Sky motes running IPv6 with RPL routing have a battery lifetime of years, while delivering 0.6 packets per second to a sink...

We present Anquiro, a domain-specific model checker for statically verifying the correctness of sensor network software. In this context, static verification has hitherto received little attention, as state space explosion problems may prevent applying these techniques. Anquiro overcomes this limitation by providing different abstraction levels dep...

Power consumption is of utmost concern in sensor networks. Researchers have several ways of measuring the power consumption of a complete sensor network, but they are typically either impractical or inaccurate. To meet the need for practical and scalable measurement of power consumption of sensor networks, we have developed a cycle-accurate simulat...

When developing sensor network applications, the shift from simulation to testbed causes application failures, resulting in additional time-consuming iterations between simulation and testbed. We propose transferring sensor network checkpoints between simulation and testbed to reduce the gap between simulation and testbed. Sensornet check- pointing...

Power consumption is the most important metric in wireless sensor network research, but existing simulation tools for measuring or estimating power consumption are either impractical or have unclear accuracy. We present COOJA/MSPSim, a practical simulation-based tool for network-scale power estimation based on Contiki’s built-in power profiling mec...

Wireless sensor networks are moving towards emerging standards such as IP, ZigBee and WirelessHART which makes interoperability testing important. Interoperability testing is performed today through black-box testing with vendors physically meeting to test their equipment. Black-box testing can test interoperability but gives no detailed informatio...

Simulators are indispensable tools to support the development and testing of cooperating objects such as wireless sensor networks (WSN). However, it is often not possible to compare the results of different simulation tools. Thus, the goal of this paper is the specification of a generic simulation platform for cooperating ob-jects. We propose a pla...

Despite sensor network protocols being self-configuring, sensor net- work deployments continue to fail. We report our experience from two recently deployed IP-based multi-hop sensor networks: one in-door surveillance network in a factory complex and a combined out-door and in-door surveillance network. Our experiences highlight that adaptive protoc...

Building automation systems (BAS) are used to control and improve indoor building climate at reduced costs. By integrating BAS with wireless sensor networks, the need for cabling can be removed, and both installation and operational costs significantly reduced. Furthermore, temporary BAS installations are made possible. By implementing and evaluati...

In this paper we present the design and implementation of a small-scale marine sensor network. The network monitors the temperature in the Baltic Sea on different heights from the water surface down to the bottom. Unlike many other wireless sensor networks, this network contains both a wired and a wireless part. One of the major challenges is that...

Software development for wireless sensor networks is a challenging and time consuming task. The resource limited hardware with limited I/O and debugging abilities combined with the often cumbersome hardware debugging tools makes low-level debugging on the target hardware difficult. We present MSPsim, an extensible sensor board platform and MSP430 i...

Various experiments have shown that the perfor-mance of wireless sensor networks is very hard to predict. It is also acknowledged that deploying sensor networks in real settings is a difficult and tedious task. To contribute to the understanding of wireless sensor network behavior we report on our experience from two recently deployed sensor networ...

Simulators for wireless sensor networks are a valuable tool for system development. However, current simulators can only simulate a single level of a system at once. This makes system development and evolution difficult since developers cannot use the same simulator for both high-level algorithm development and low-level development such as device-...

TAC SCM is a supply chain management game for the Trading Agent Competition (TAC). The purpose of TAC is to spur high quality research into realistic trading agent problems. We discuss TAC and TAC SCM: game and competition design, scientific impact, and lessons learnt. With a conscious effort to these ends, a competition may help focus research on...

From experience with wireless sensor networks it has be- come apparent that dynamic reprogramming of the sensor nodes is a useful feature. The resource constraints in terms of energy, memory, and processing power make sensor network reprogramming a challenging task. Many different mecha- nisms for reprogramming sensor nodes have been developed rang...

This is the specication for the Trading Agent Competition { Supply Chain Management Game for 2005 (TAC SCM-05). Agents are simulations of small manufacturers, who must compete with each other for both supplies and customers, and manage inventories and production facilities. Based on experience with the 2003 and 2004 trading agent competitions, a fe...

agent competition a few enhancements have been added to the original game. The price function has been modified to better reflect demand; 2) storage costs have been introduced; and 3) customer demand has been segmented into multiple markets. Page 2/201 Background and motivation Supply chain management is concerned with planning and coordinating the...

The Trading Agent Competition (TAC) has now become an annual fixture since its inception in 2000. The competition was conceived with the objective of studying automated trading strategies by focusing the research community on the development of competing solutions to a common trading scenario. The success of past TAC events has motivated broadening...

In this paper we discuss the motivation behind the design of the supply chain management trad- ing agent competition game(TAC SCM). We look at some of the new challenges introduced by the game and summarize what we view as key research challenges that need to be ad- dressed in designing successful game agents. Finally, we look at some possible futu...

The Trading Agent Competition (TAC) combines a fairly realistic model of the Internet commerce of the future, including shopbots and pricebots, with a challenging problem in automated reasoning and decision making.

We describe the results of the MarketSpace project, carried out as part of the Software Systems #Programvarusystem DV1, 20p# course, in the fourth year of the programming methodology branch of the Computer Science Program #DVP# at Uppsala University. Partners were Telia Research and Swedish Institute of Computer Science. The project have resulted i...

. We present a simple and uniform communication framework for an agent-based market infrastructure, the goal of which is to enable automation of consumer goods markets distributed over the Internet. The framework consists of an information model for participant interests and an interaction model that defines a basic vocabulary for advertising, sear...

Internet has evolved from an information space to a market space with thousands, potentially millions, of electronic storefronts, auctions and other commercial services. This creates great opportunities, but is not without problems. One major problem is the difficulty of finding relevant offers. Another problem is coping with the multitude of diffe...

Introduction Market infrastructures Currentweb-based commerce is by and large a replica of real-world commerce. Customers are supposed to visit various electronic storefronts, inspect the digital displays of goods and services, and, perhaps after some comparison shopping, place an order. Unfortunately they have to do it in person. Attempts at suppo...

Introduction At a #rst glance, the web may seem like a good infrastructure for electronic commerce, but with a closer look, and with a view to future open agent-based market infrastructures, the insu#ciencies become apparent. There are # no standards for describing the interests of participants in the market, suchas having products for sale, and #...

Introduction During the last year we have been involved in several projects that have utilized the agent metaphor. A vital part of the work has been to identify and implement mechanisms#constructs that enabled us to work at a suitable level of abstraction. As a result several modules representing the basic functionality needed for agent oriented ap...

We describe the first steps towards an open agent-based market infrastructure and why it is needed. Some existing electronic markets on Internet, and thoughts about what the electronic markets of tomorrow will be like, are presented. The basis for the market infrastructure is an interest based information model and a speech act like interaction mod...

The lack of structure of information and interaction in current web-based electronic commerce makes partial or full automation infeasible. We describe the first steps towards an open agent-based market infrastructure, with well-defined information and interaction models allowing agents to locate relevant market participants, exchange interests, and...

At a first glance, the web may seem like a good infrastructure for electronic com- merce, but with a closer look, and with a view to future open agent-based market infrastructures, the insufficiencies become apparent. There are no standards for describing the interests of participants in the market, such as having products for sale, and no standard...

Wireless sensor networks are moving towards emerging standards such as IP, ZigBee and WirelessHART which makes interoperability testing important. Interoperability testing is today performed through black-box testing with vendors physically meeting to test their equipment. For interoperability testing of these standards, a white-box approach is des...

Abstract Wireless sensor networks consist of many,small nodes. Each node has a microprocessor, a radio chip, some sensors, and is usually battery powered

Traditional WSN simulators are limited to simu- lating nodes at one single abstraction level. This makes system development and evolution difficult since developers canno t use the same simulator for both high-level algorithm development and low-level development such as device-driver implementations. The Contiki simulator COOJA allows for cross-le...