A multihomed node has several paths with its correspondent, maintained by several multihoming protocols. The decision to route a packet over a specific path relies on filter rules, which result from the comparison between the path's characteristics and the user policy. Multihoming protocols or their implementations provide various user interfaces to configure the filter rules. However, there is currently no method to describe user policy in terms of cost, bandwidth, delay and other network characteristics, and to compare this policy with the path characteristics. We thus propose in this paper a new framework for policy management for flow distribution, which offers a user interface to define policies and generates filter rules for each multihoming protocol. We first sort out the requirements for users in the multihomed environment. By reviewing some of the most important multihoming protocols and implementations, we show that they do not match all those requirements. We then propose a new policy management framework that fits those very requirements.
A number of devices, including sensors, mobile phones, and various computers will be deployed in next generation vehicles, and interconnected through an embedded in-vehicle network. These vehicles will be connected to the Internet as both a step toward ubiquitous computing and as a means to meet Intelligent Transportation Systems (ITS) needs. At first, a communication system is required to connect vehicles to the Internet. Such communication system is investigated in our InternetCAR project. For flexibility and ease of use, we advocate IPv6. This paper particularly focus on network mobility since network mobility support is mandated to maintain ongoing sessions as the in-vehicle embedded network changes its point of attachment to the Internet topology. We outline our testbed specifically designed for the purpose of demonstrating our proposed communication system and we detail our implementation based on Prefix Scope Binding Updates, the initial network mobility support solution proposed at the IETF before the NEMO working group was set up.
Abstract. This paper proposes a communication system which ensuresInternet connectivity and network transparency to a group of nodes with several network interface devices. We also implement this system as Invehicle Router System. A vehicle consists of a group of nodes such as sensor nodes and devices held by passengers, is connected to the Internet through several network interface devices. It is typical for buses, trains, and airplanes to have such Mobile Internet environment, and the nodes in such vehicles have t o c hange the attachment point of the Internet frequently. But the nodes would then not be able to maintain transport and higher-layer connections if it changes the attachment point. Thus, it is important to provide mobility support like Mobile IP. These nodes include low cost network appliances with only limited space for extra functions. It is preferred that a solution has no impact on these low cost nodes. Therefore, existing Host Mobility Protocol is not suitable for this situation. In this article, we propose the In-vehicle Router System as a solution to this situation by combining network mobility protocol with Interface switching system. We also implement and evaluate our system on the InternetITS testbed. We h a v e conrmed that our system provides enough functionality to satisfy the requirements of Mobile Internet vehicles.
Abstract-Network mobility (NEMO) support is used to maintain the Internet connectivity of a group of terminals located into a network that changes its point of attachment to the Internet. The Internet access is made through a number of interfaces on a Mobile Router acting as a gateway of the mobile network. The overall bandwidth can be increased and redundancy can be provided by serving the mobile network through multiple mobile routers. However, this raises a number of issues related to multihoming. We therefore propose a Multiple Mobile Router Management (MMRM) system which allows nodes in the mobile network to be connected transparently to the Internet through multiple mobile routers. Mobile routers can dynamically join and leave the mobile network. They cooperate in order to share their Internet access within the entire mobile network. The proposed system is implemented and evaluated. Evaluation results show that the overhead of our system is negligible while redundancy and the overall bandwidth for the nodes in the mobile network are increased.
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