Abstract

Recently MPLS is used for building up VPNs in IP backbone, called MPLS VPNs. In this paper, we discuss issues on finding routes with QoS requirements (i.e., QoS routing) in MPLS VPNs. We first present background on MPLS VPNs as well as QoS routing. Then we discuss both the benefits and problems resulted from introducing QoS routing into MPLS VPNs. We particularly present an architecture of MPLS VPNs with QoS routing capability, on which we discuss some important issues on running QoS routing in MPLS VPNs. Document type: Part of book or chapter of book

Abstract

The provision of services and the production of wares and services nowadays often require the cooperation of partners from different sectors. These cooperations can comprise public and private organizations, companies, universities, NGOs, and other groupings as well as individuals. The cooperative collaboration is esteemed as a core element of democratic social systems within a free market economy (Kirsch, 1996; Pongsiri, 2001). As one relevant method of organizing such collaborations, public private networks (PPN) extend the concept of public private partnerships (PPP) by adding the idea of networking and its core elements. From a scientific point of view as well as from the business perspective there is a shortcoming in the systematic processing of ideas, motivations, and forms as well as implications for internal and external participants of PPPs/PPNs. In the following, partnerships between partners from public and private business environments will be discussed. (Pongsiri, 2001) In particular, PPPs and PPNs in the field of academic education will be portrayed, since the cooperation in knowledge intensive areas is seen as an important issue. (Inkpen, 1996; Seufert, von Krogh, & Back, 1999) In the following the concepts of PPPs and PPNs will be explained. This will be done by an extensive literature review. The aim is to provide the required definitions and to discuss the incorporated views of others. Document type: Part of book or chapter of book

Abstract

International audience; Mobility and security are major features for both current and future network infrastructures. Nevertheless, the integration of mobility in traditional virtual private networks is difficult due to the costs of re-establishing broken secure tunnels and restarting broken connections. Besides session recovery costs, renegotiation steps also present inherent vulnerabilities. In order to address these issues, we propose a new distributed mobile VPN system called SEcured MObile Session (SEMOS). Based upon our CLOAK peer-to-peer overlay architecture, SEMOS provides security services to the application layer connections of mobile users. Secure and resilient sessions allow user connections to survive network failures as opposed to regular transport layer secured connections used by traditional VPN protocols. Document type: Part of book or chapter of book