Lambert J. M. Nieuwenhuis

From enterprise architecture to business models and back

In this study, we argue that important IT change processes affecting an organization’s enterprise architecture are also mirrored by a change in the organization’s business model. An analysis of the business model may establish whether the architecture change has value for the business. Therefore, in order to facilitate such analyses, we propose an approach to relate enterprise models specified in ArchiMate to business models, modeled using Osterwalder’s Business Model Canvas. Our approach is accompanied by a method that supports business model-driven migration from a baseline architecture to a target architecture and is demonstrated by means of a case study.

Deployment of e-health services - a business model engineering strategy.

We designed a business model for deploying a myofeedback-based teletreatment service. An iterative and combined qualitative and quantitative action design approach was used for developing the business model and the related value network. Insights from surveys, desk research, expert interviews, workshops and quantitative modelling were combined to produce the first business model and then to refine it in three design cycles. The business model engineering strategy provided important insights which led to an improved, more viable and feasible business model and related value network design. Based on this experience, we conclude that the process of early stage business model engineering reduces risk and produces substantial savings in costs and resources related to service deployment.

Value added Web: integrating WWW with a TINA service management platform

One of the most spectacular developments of this decade is the enormous growth of the Internet. One of the most popular services of the Internet is the World Wide Web (WWW). It may be expected that the Web will be used to provide more sophisticated services, e.g., video on demand. Customers will be prepared to pay for such services, because of the exclusive content and the quality of the (broadband) transport network needed to transfer the information. Consequently, we need a way to manage these services, without violating the ease of use provided by current WWW. In this paper we present a solution based on TINAs business model. We introduce the value added Web (VAW), which is an integration of the WWW with TINA service management. This combination adds the benefits of the TINA business model to the WWW. A VAW session appears as a normal WWW session, except that it allows charging for specific content and the setup of connections with an agreed quality of service. The VAW business model assumes that users only have a direct relation with a retailer and that the retailer is responsible for charging. This paper describes the rationale behind VAW and the design and implementation of a prototype of VAW.

Protocols for Multimedia Systems

The goal of the PROMS series of conferences and workshops is to contribute to scientific, strategic, and practical cooperation between research institutes and industrial companies in the area of multimedia protocols. This is also the goal of PROMS 2001. The basic theme of this conference continues to be multimedia protocols, both at the network and application level, although the increasing interest in wireless, mobility, and quality-of-service as interrelated topics with relevance to multimedia are reflected in the current program. The papers are grouped as follows in sessions for the single track technical program: (1) QoS in the Internet, (2) Multimedia streaming, (3) Multimedia multicast, (4) Wireless networks and host mobility, (5) TCP/IP optimization, and (6) Service development and deployment. The technical program is complemented with two invited presentations: “From Mars to Your TV at Home - Selected Internet Developments” by Erik Huizer and “Which Way to the Wireless Internet ?” by Andrew Campbell.

Design of an Online Charging System to Support IMS-Based Inter-domain Composite Services

For service providers online charging of composite services is necessary in order to manage financial risks of service delivery in multi-domain environments. At service level, inter-domain composite services consist of one or more service components, e.g. access service, IMS communication service or content service, delivered by different service providers. The 3rd Generation Partnership Project (3GPP) has developed a framework for off-line and online charging of IMS-based services. However, the current Online Charging System (OCS) specified by 3GPPP does not support an online charging function for composite services. The contribution of this work lies in the design of an online charging system that addresses the required charging functionalities based on the IMS online charging architecture. The design consists of a service composition information model guided by the NGOSS and SID concepts of the TeleManagement Forum, a set of functional charging system components and their interactions at their interfaces.

Traffic measurements for link dimensioning :a case study

Traditional traffic measurements meter throughput on time scales in the order of 5 minutes, e.g., using the Multi Router Traffic Grapher (MRTG) tool. The time scale on which users and machines perceive Quality of Service (QoS) is, obviously, orders of magnitudes smaller. One of many possible reasons for degradation of the perceived quality, is congestion on links along the path network packets traverse. In order to prevent quality degradation due to congestion, network links have to be dimensioned in such a way that they appropriately cater for traffic bursts on time scales similarly small to the time scale that determines perceived QoS. It is well-known that variability of link load on small time scales (e.g., 10 milliseconds) is larger than on large time scales (e.g., 5 minutes). Few quantitative figures are known, however, about the magnitude of the differences between fine and coarse-grained measurements. The novel aspect of this paper is that it quantifies the differences in measured link load on small and large time scales. The paper describes two case studies. One of the surprising results is that, even for a network with 2000 users, the difference between short-term and long-term average load can be more than 100%. This leads to the conclusion that, in order to prevent congestion, it may not be sufficient to use the 5 minute MRTG maximum and add a small safety margin.

Online Charging for IMS-Based Inter-domain Composite Services

In order to manage financial risks online charging of composite services is becoming increasingly important for service providers to support service delivery in inter-domain environments. The 3rd Generation Partnership Project (3GPP) has developed a framework for off-line and online charging of IMS-based services. At service level, delivery of composite services often involves many service providers, where each service provider is responsible for the delivery of one or more service components (e.g. access service, IMS communication service, content service, etc.). Current Online Charging System (OCS) specified by 3GPPP does not support an online charging function for composite services. This paper discusses a number of implications of online charging of composite services, in particular inter-domain composite services. It addresses important shortcomings of the current 3GPP online charging architecture and suggests a way to overcome these shortcomings. The contribution of this paper is twofold. Firstly, it proposes an information model to support charging of inter-domain composite services. The proposed information model is based on the NGOSS and SID concepts of the TeleManagement Forum. Secondly, it proposes additional functionalities required for existing OCS in IMS to handle online charging of inter-domain composite services.

Measuring the Impact of a Successful DDoS Attack on the Customer Behaviour of Managed DNS Service Providers

Distributed Denial-of-Service (DDoS) attacks continue to pose a serious threat to the availability of Internet services. The Domain Name System (DNS) is part of the core of the Internet and a crucial factor in the successful delivery of Internet services. Because of the importance of DNS, specialist service providers have sprung up in the market, that provide managed DNS services. One of their key selling points is that they protect DNS for a domain against DDoS attacks. But what if such a service becomes the target of a DDoS attack, and that attack succeeds? In this paper we analyse two such events, an attack on NS1 in May 2016, and an attack on Dyn in October 2016. We do this by analysing the change in the behaviour of the services customers. For our analysis we leverage data from the OpenINTEL active DNS measurement system, which covers large parts of the global DNS over time. Our results show an almost immediate and statistically significant change in the behaviour of domains that use NS1 or Dyn as a DNS service provider. We observe a decline in the number of domains that exclusively use NS1 or Dyn as a managed DNS service provider, and see a shift toward risk spreading by using multiple providers. While a large managed DNS provider may be better equipped to protect against attacks, these two case studies show they are not impervious to them. This calls into question the wisdom of using a single provider for managed DNS. Our results show that spreading risk by using multiple providers is an effective countermeasure, albeit probably at a higher cost.

Protocols for Multimedia Systems - Proceedings of the 6th International Conference, PROMS 2001, Enschede, The Netherlands, October 2001

The goal of the PROMS series of conferences and workshops is to contribute to scientific, strategic, and practical cooperation between research institutes and industrial companies in the area of multimedia protocols. This is also the goal of PROMS 2001. The basic theme of this conference continues to be multimedia protocols, both at the network and application level, although the increasing interest in wireless, mobility, and quality-of-service as interrelated topics with relevance to multimedia are reflected in the current program. The papers are grouped as follows in sessions for the single track technical program: (1) QoS in the Internet, (2) Multimedia streaming, (3) Multimedia multicast, (4) Wireless networks and host mobility, (5) TCP/IP optimization, and (6) Service development and deployment. The technical program is complemented with two invited presentations: “From Mars to Your TV at Home - Selected Internet Developments” by Erik Huizer and “Which Way to the Wireless Internet ?” by Andrew Campbell.

Protocols for multimedia systems : 6th international conference, PROMS 2001, Enschede, The Netherlands, October 17-19, 2001 : proceedings

The goal of the PROMS series of conferences and workshops is to contribute to scientific, strategic, and practical cooperation between research institutes and industrial companies in the area of multimedia protocols. This is also the goal of PROMS 2001. The basic theme of this conference continues to be multimedia protocols, both at the network and application level, although the increasing interest in wireless, mobility, and quality-of-service as interrelated topics with relevance to multimedia are reflected in the current program. The papers are grouped as follows in sessions for the single track technical program: (1) QoS in the Internet, (2) Multimedia streaming, (3) Multimedia multicast, (4) Wireless networks and host mobility, (5) TCP/IP optimization, and (6) Service development and deployment. The technical program is complemented with two invited presentations: “From Mars to Your TV at Home - Selected Internet Developments” by Erik Huizer and “Which Way to the Wireless Internet ?” by Andrew Campbell.