Charles Perkins, Andrew Myles, and David B. Johnson. IMHP: A mobile host protocol for the internet. Computer Networks And ISDN Systems, 27(3):479--491, 1994.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....and Skellern [Myles and Skellern 93] evaluated three such proposals [Ioannidis 93, Perkins and Bhagwat 94, Teraoka et al. 92] based on considerations such as compatibility with existing infrastructure, route optimality, and migration procedures. Subsequent work [Myles and Perkins 93, Johnson 94, Perkins et al. 94] sought to address problems of the earlier proposals in areas such as robustness, scalability and security. The IETF Mobile IP Working Group was chartered to develop or adopt architectures and protocols to support mobility within the Internet 1 . This group has been working on the ....

C. Perkins, A. Myles, and D. Johnson, "IMHP: A Mobile Host Protocol for the Internet", Computer Networks and ISDN Systems, Vol. 27, No. 3, pp. 479-491, December 1994.

....A network layer protocol provides a global node identifier and an addressing scheme in the network as the basic unit of the end to end communication. Movement with the global node identifier enables end to end transparent reachability independent of the mobile host s relocation. Mobile IP[9] [7], 8] Mobile IP is a mobile extension to IP. Using IP tunneling mechanism through Home Agent (HA) and Foreign Agent (FA) a mobile and a correspondent host can communicate with each other with a pair of the same IP addresses even after the mobile host s relocation. Mobile IP, however, does not ....

C. Perkins, A. Myles, and D. B. Jonson, "IMHP: A mobile host protocol for the internet," Computer Networks and ISDN System, vol. 27, pp. 479--491, 1994.

....on protocol specifications, referred to as an RFC, which will handle these problems [43] Network layer concerns are not addressed further in this document. However, the reader is encourage to consult the following 11 sources for a better understanding of the issues and concerns of this layer [6, 21, 26, 29, 30 33, 37, 42, 43, 49, 50 52, 54, 55]. 1.4 Desired traits or features in a wireless local area network (WLAN) A look at the desired features in a wireless local area network will provide further insight into the architectural issues of this form of networking. Some of the features that would be beneficial in a wireless network can ....

....network be easy to maintain. By this, user movement while wirelessly accessing the company s network via a portable unit, should appear seamless. Once a network connection has been established, the user should be able to maintain it regardless of where in a given office environment they may wander [29, 37, 43]. This requirement, however, does not need to also include the lack of interruption. Users will understand that changing position may produce a momentary pause in the application they are running. However, the application should not stop and require a complete cold restart simply because a user ....

[Article contains additional citation context not shown here]

Perkins C., Myles A., and Johnson D. "IMHP: A Mobile Host Protocol for the Internet," Computer Networks and ISDN Systems, No. 27, pp. 479-491, (NH Elsevier Science Publishers B.V.: Amsterdam, 1994).

....it is concerned with optimum routing, ecient and robust migration, and ecient use of network resources. Other issues include cost, host impact, infrastructure requirements and backward compatibility. 2.1 Unicast Routing in Mobile Networks 13 2.1.1. 1 Solutions Myles et al. 18] and Perkins et al. [19] describe the Internet Mobile Host Protocol (IMHP) which supports route optimisation and authentication. The working of this protocol is similar to the proposed IETF Mobile IP [10] standard. The only di erence is that optimal routing is considered as an extension in the IETF s proposal. Myles et ....

C. Perkins, A. Myles, and D. B. Johnson, \IMHP:a mobile host protocol for the internet," Computer Networks and ISDN Systems: Special Issue on Selected Papers of the Annual Conference of the Internet Society/5th Joint European Networking Conference, vol. 27, pp. 479-491, Dec. 1994.

....less easily than in a closed system. Further complicating the matter is the possibility of malicious servers that do not execute the service but respond positively, or poorly written ones that perform the service but forget to respond. Connectivity. Above and beyond the problem of packet routing [2, 37], mobile client systems might need to periodically verify whether they are still connected to the nearest directory object. There are two paradigms for managing nomadic, possibly disconnected, computers. It can be up to the system to locate the mobile party and pass on information when it suits ....

C. Perkins, A. Miles, and D. Johnson. "IMHP: A mobile host protocol for the Internet." Computer Networks and ISDN Systems, vol. 27, no. 3, December 1994.

....to and from the MH can continue using the MH s home address, despite its mobility. There are two problems with this approach. First, datagrams to the MH are always routed via its HA, resulting in suboptimal triangle routing , as shown in Figure 1. Proposed extensions rectify this problem [21, 20], but their applicability and performance in a wide area network remain unclear. Second, the registration process has no de registration counterpart, as the MH may lose connectivity with the FA at any time, due to movement. For this reason, all information on a visiting MH is deleted after some ....

....To deliver datagrams from an arbitrary sender to a dynamic set of receivers, we need mechanisms to: 1. Track group membership. 2. Route data to group members. 1 This description is based on the draft proposal for mobile IP, which closely resembles the Internet Mobile Host Protocol (IMHP) [21, 20]. In the following sections we split the required mechanisms into local , which deal with group membership management and local datagram delivery, and global , which deal with multicast routing from senders towards any interested local networks. 3.1 Local Multicasting Mechanisms Locating hosts ....

C. Perkins, A. Myles, and D.B. Johnson. IMHP: A mobile host protocol for the Internet. Computer Networks and ISDN Systems, 27:479--491, December 1994.

....work on mobile TCP IP has been conducted at the network layer from where the key problem stems. These solutions aim at supporting mobility in the IP protocol layer. There are four major Mobile Host Protocol (MHP) proposals, namely, Sony MHP[22] Columbia MHP[4, 5] IBM MHP[11, 12] 2 and IMHP[3, 13, 14]. The IMHP proposal was derived from the others, and has now been adopted by IETF as the Internet draft standard. All of these four MHPs share a common technology that is to provide mobility at the network layer and keep the IP addresses of mobile hosts constant to all the upper layers. Hence, no ....

Charles Perkins, Andrew Myles, and David Johnson. IMHP: A mobile host protocol for the internet. Computer Networks and ISDN System, 27:479--491, 1994.

....location and identity throughout the network. Unfortunately, this means that all packets need to be routed through MSRs and thus will not utilize the optimal routes. rmAll of the proposals mentioned above have drawbacks and rarely address security concerns. In response, Perkins, Myles and Johnson [64] have combined the best parts of these protocols along with security features to create a new protocol called the Internet Mobile Host Protocol (IMHP) The protocol defines four entities: the mobile host, local agent, cache agent, and home agent. The mobile host is assigned a static IP number from ....

Perkins, C., Myles, A., and Johnson, D.B. Imhp: a mobile host protocol for the internet. Computer Networks and ISDN Systems, 27(3):479--91, December 1994.

....is given in this paper. 1 Introduction The current TCP IP protocol suite has faced a new challenge: mobile communication. Based on the layer where mobility is supported, different approaches have been proposed in TCP IP based systems, such as the mobile link solution[7] the mobile IP solutions[15, 2, 3, 8, 9, 4, 5, 1, 10, 11], and the mobile TCP socket solution[13] The Mobile Data Link (MDL) solution[7] suggests that mobility be transparently supported at the lowest Link layer, above which all running protocol entities are not conscious of any mobile support. If a mobile host is in its home network, all data link ....

....our two step solution provides portable and mobile supports on network and transport layers, we use (2;3) to denote it layering structure) of our system will outperform MDL and IMHP. Because our two step solution provides portable support in IP layer as well, we compare it with IETF s IMHP[1, 10] protocol in terms of the data transfer cost C 2;3 under two typical applications: telnet and ftp. Here, we assume the network is well balanced. In other words, the data transfer cost C 2;3 is mainly dependent on the length of the path. All processing costs at intermediate systems (routers or ....

Charles Perkins, Andrew Myles, and David Johnson. IMHP: A mobile host protocol for the internet. Computer Networks and ISDN System, 27:479--491, 1994.

....cause of dropped packets. After all, a mobile computer could still experience network congestion, so neither strategy is correct under every circumstance. An existing foreign agent, however, could well be equipped with code to forward packets to the new location of a mobile client after it moves [12]. This would be arranged by the mobile host with the cooperation of its new foreign agent, and provides a good method for avoiding dropped packets as long as it s physically possible to transmit the packets in transit either directly to the mobile host or indirectly through its new foreign agent. ....

....forwarded, and delivered; then, the previous care of address can be released to the DHCP allocation pool again. This solves the black hole problem almost completely, except for Internet agents which may have cached the mobile node s previous care of address and not been notified of the movement [12]. Even without such sophistication in the mobile node implementation, DHCP can allow mobile clients to move about with a good deal of performance transparency (if not perfect) and applications will continue to work even in the face of packets dropped in transit, because of the nature of the ....

Charles Perkins, Andrew Myles, and David Johnson. IMHP: A Mobile Host Protocol for the Internet. In Proceedings of INET'94/JENC5, page 642, June 1994.

....In this section, we will describe in some detail the necessary protocol operations (called route optimization) to eliminate the triangle routing problem. The current protocol definition may be found in the Internet draft [15] and there are additional details in an earlier paper on the subject [21]. The advantages of route optimization are clear. The disadvantage is that, for the first time, and in major distinction to the base mobile IP protocol, changes are required in the correspondent nodes. A. Route Optimization Overview The basic idea underlying route optimization is that the routes ....

Charles Perkins, Andrew Myles, and David Johnson. IMHP: A Mobile Host Protocol for the Internet. Computer Networks and ISDN Systems, 27(3):479--491, December 1994.

No context found.

Charles Perkins, Andrew Myles, and David B. Johnson. IMHP: A mobile host protocol for the internet. Computer Networks And ISDN Systems, 27(3):479--491, 1994.

Online articles have much greater impact   More about CiteSeer.IST   Add search form to your site   Submit documents   Feedback  

CiteSeer.IST - Copyright Penn State and NEC