Abstract new address must be edited into various configuration ” files. This paper describes a new protocol for transparently rout-ing packets to mobile hosts operating in a large internet-work. The protocol, called the Mobile Host Routing Proto-col (MHRP), allows any host to become mobile at any time, yet there is no penalty for a host being “mobile capable,” since the protocol automatically uses only the standard in-ternetwork routing mechanisms and adds no overhead when a mobile host is currently connected to its home network. The paper concentrates on the design of MHRP as it ap-plies to the Internet using IP. Mobile hosts use only their “home ’ ’ IP addresses, regardless of their current location in the Internet. No changes are required in stationary hosts that communicate with mobile hosts, and no changes are required in mobile hosts above the IP level. MHRP intro-duces several new features to provide better robustness for routing to mobile hosts, and provides better scalability to very large numbers of mobile hosts than previous mobile host protocols. 1.

This paper considers the problem of providing transparent support for very large numbers of mobile hosts within a large internetwork such as the Internet. The availability of powerful mobile computing devices and wireless networking products and services is increasing dramatically, but internetworking protocols such as IP used in the Internet do not currently support host movement. To address this need, the Internet Engineering Task Force (IETF) is currently developing protocols for mobile hosts in the Internet. This paper analyzes the problem to be solved, reviews the current state of that effort, and discusses its scalability to very large numbers of mobile hosts in a large internetwork. 1.

This paper describes a new protocol to support IP multicast for mobile hosts in an IP internetwork. It uses the basic unicast routing capability of IETF Mobile IP as a foundation, and leverages existing IP multicast to provide multicast services for mobile hosts as well. We believe that the resulting scheme is simple, scalable, transparent, and to the extent possible, independent of the underlying multicast routing facility. Discrete-event

The amount of mobile and nomadic computing is expected to increase dramatically in the near future. Hand in hand with this ubiquitous mobile computing security and privacy problems show up, which have not been dealt with sufficently up to now. The main problems are traffic analysis and the easy access to location information, for example in the popular Internet just by looking at the address headers of messages. In this paper the need for security and privacy supporting networks is discussed. We present the Non-Disclosure Method (NDM) as a way to provide the user with variable and scalable security and privacy. We exemplarily demonstrate the applicability of NDM in an existing network by presenting an upward compatible protocol extension to the Internet Protocol (IP), the Secure IP in IP Protocol. Its main design goal is the untraceability of network connections in mobile environments. I. Introduction Today, the TCP/IP protocol suite provides little or almost no security to the user...

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Much research has been devoted to mobile computing and database query management with the advent of portable computers and wireless communication systems. This paper proposes an architecture based on current mobile models, but with the addition of a mailbox, which serves as a storage area for the mobile hosts. Mobile Hosts (MHs) and Mobile Support Stations (MSSs) are connected over a wireless virtual subnet, and the MSSs are in turn connected to a wired static network. The architecture uses the TCP/IP protocol for communication in a mobile computing environment. Cellular providers (CP), the mobile network, and supporting hardware are defined and then assembled into a detailed example which traces the database query through the architecture. 1 Introduction In the past, computer users would have to disconnect from the network every time they needed to travel, but with the emergence of wireless connections the user is able to maintain a connection to the network during movement. A mobile...

There is an increasing need to support user mobility in today's computing environments. Packet-switched computer networks are commonplace and are used to provide services to users who, increasingly, may be mobile. Hence, routing packets to mobile hosts is a problem of considerable research and commercial interest. Of significant interest are protocols like those intended for TCP/IP networks in general and the Internet in particular. This thesis deals with approaches to supporting mobility in a TCP/IP internetwork. A split-level design is presented for providing routing support for mobile hosts. A prototype implementation of a unicast mobile routing protocol was implemented in a 4.3 BSD Unix TM operating system. The performance of the mobile routing subsystem was evaluated using measurements by suitably instrumenting the kernel and using a framework developed for performing the experiments. The mobile routing subsystem was found to perform well in the context of common network techno...