“It matters if you just don't give up.”

Prof. Gerald Q. Maguire Jr. has been an invaluable source of inspiration ever since we met in early 1996, when I was pioneering the first ‘Voice over IP ’ services. I would like to express my deep gratitude to my advisor Professor Maguire, who’s foresight, encouragement, enthusiasm, and inspiration set an example for my research, and his tireless support and advice helped me to start asking the real questions, and in successive projects produce step-by-step proof of the feasibility of mobile multimedia on wireless Internet and its potential for user-centric communication. I was also very fortunate to have Dr. Mark T. Smith of HP-labs as my second advisor for my research. Mark generously shared his views and advice concerning how to look upon services from a consumer perspective, which I then could contrast to the telecom mindset in the ‘mobile valley ’ of north Stockholm. I also thank the late Tech.Lic. Anders Carlsson- the CEO of Ellemtel until his early death in 1997, whose leadership inspired us to find new ways of communication- for preparing the ground for this research. I would also like to recognize the support of my management, Aleksander Marlevi (in 1998 the vice-CEO of Ellemtel where this thesis work began), Håkan Eriksson (head of Ericsson Research, where this thesis work was completed in 2001), and in particular Rolf Leidhammar (director of Applications & Software research) fo

An eXtensible Service Protocol for Adaptive Personal Mobile Communication

Personal Mobile Communication services are no longer limited by connection-oriented network access to the services that network service nodes are able to offer. Given the ability to deliver services using end-to-end IP connectivity – notably over wireless links – will cause services to move out to the mobile end-devices. In addition, IP enables us to use multiple services over the same link. Consequently, we need ways to enable the enddevices to deal with the greater degrees of freedom, when our personal communication allows us to use any combination of services that may be running in other enddevices. With short-range radio links, our need to make use of and deal with spontaneous connectivity increases even further. In this paper, a novel eXtensible Service Protocol (XSP) is described. After examining its properties, we look at how it can enable ad-hoc mobile applications, as well as enabling adapting applications to the conditions and context of the communication. 1

Submission to the MobEA workshop of the WWW2003 conference Cooperative Mobile Ambient Awareness

Abstract. In this paper, we examine the requirements, conditions, and work in progress regarding support for cooperative mobile ambient awareness in heterogeneous wireless and mobile infrastructure. Ambient awareness is achieved by reasoning about context knowledge, accumulated and disseminated between entities in the local- & global computing and communication environment of users. With such support, we can enable the spontaneous orchestrated and cooperative behavior of various entities (people, places, objects). 1

ABSTRACT

This paper characterizes the properties of fourthgeneration wireless networks (4G). Given the properties of 4G, we need a plug- and play Internet, where users, mobile artifacts, and (potentially intelligent) virtual objects are able to meet and engage in communication, thus creating a Mobile Interactive Space on Wireless Internet. Thus mechanisms are needed that enable ad-hoc application level communication, not requiring prior knowledge of the existence or attributes of other entities. In this paper I propose and describe an a application architecture for adaptive mobile communication for Wireless Internet featuring an eXtensible Service Protocol that has these necessary properties. We show that it is easy and cost-effective to build those networks, with our testbed for new adaptive applications fo

Continuously Changing Information on a Global Scale and its Impact for the Internet-of-Things

This article analyzes the challenges of supportingcontinual changes of context information in Internetof-Things applications. These applications require aconstant flow of continuously changing information fromsensor based sources in order to ensure a high quality-ofexperience.However, an uncontrolled flow between sourcesand sinks on a global scale wastes resources, such ascomputational power, communication bandwidth, andbattery time. In response to these challenges we presenta general approach which focuses on four layers wherewe provide a proposed solution to each layer. We haverealized the general model into a proof-of-concept implementationrunning on devices with limited resources,where we can moderate the information exchange basedon relevance and sought after quality-of-experience bythe applications. In conclusion, we evaluate our solutionand present a summary of our experiences regardingthe impact of continuously changing information on theInternet-of-Things.Publ online 27 october 2013</p

Layering the Internet-of-Things with Multicasting in Flow-sensors for Internet-of-services

Development of Internet-of-Services will be hampered by heterogeneous Internet-of-Things infrastructures, such as inconsistency in communicating with participating objects, connectivity between them, topology definition &amp; data transfer, access via cloud computing for data storage etc. Our proposed solutions are applicable to a random topology scenario that allow establishing of multi-operational sensor networks out of single networks and/or single service networks with the participation of multiple networks; thus allowing virtual links to be created and resources to be shared. The designed layers are context-aware, application-oriented, and capable of representing physical objects to a management system, along with discovery of services. The reliability issue is addressed by deploying IETF supported IEEE 802.15.4 network model for low-rate wireless personal networks. Flow- sensor succeeded better results in comparison to the typical - sensor from reachability, throughput, energy consumption and diversity gain viewpoint and through allowing the multicast groups into maximum number, performances can be improved

Design of Active Queue Management for Robust Control on Access Router for Heterogeneous Networks

The Internet architecture is a packet switching technology that allows dynamic sharing of bandwidth among different flows with in an IP network. Packets are stored and forwarded from one node to the next until reaching their destination. Major issues in this integration are congestion control and how to meet different quality of service requirements associated with various services. In other words streaming media quality degrades with increased packet delay and jitter caused by network congestion. To mitigate the impact of network congestion, various techniques have been used to improve multimedia quality and one of those techniques is Active Queue Management (AQM). Access routers require a buffer to hold packets during times of congestion. A large buffer can absorb the bursty arrivals, and this tends to increase the link utilizations but results in higher queuing delays. Traffic burstiness has a considerable negative impact on network performance. AQM is now considered an effective congestion control mechanism for enhancing transport protocol performance over wireless links. In order to have good link utilization, it is necessary for queues to adapt to varying traffic loads. This paper considers a particular scheme which is called Adaptive AQM (AAQM) and studies its performance in the presence of feedback delays and its ability to maintain a small queue length as well as its robustness in the presence of traffic burstiness. The paper also presents a method based on the well-known Markov Modulated Poisson Process (MPP) to capture traffic burstiness and buffer occupancy. To demonstrate the generality of the presented method, an analytic model is described and verified by extensive simulations of different adaptive AQM algorithms. The analysis and simulations show that AAQM outperforms the other AQMs with respect to responsiveness and robustness.</p