Lecture8 - MobileCommunications...

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8.1 Prof. Dr.-Ing. Jochen H. Schillerwww.jochenschiller.deMC - 2008 Mobile Communications Chapter 8: Network Protocols/Mobile IP  Motivation for Mobile IP   Ad-hoc networks, Routing protocols  Mobile IP Data transfer, Encapsulation  Micro mobility support 
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Prof. Dr.-Ing. Jochen H. Schillerwww.jochenschiller.deMC - 2008 8.2 Administrativia Feedback from HW1 Seed #’s are used for randomization. Compute average values of  your metric (e2e delay, PDR) based on different seed values Std deviation needs to be represented as error bars around the  computed mean. Midterm, Nov 5 th ? Paper presentations: Website updated with guidelines for paper presentation Tentative Schedule of presentations on handouts. Finalized after  class (deadline 9PM today) Class project: Build on top of your paper presentation, and reading of background  material Think of holes in the approach, extensions of work. I am interested in an IDEA
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Prof. Dr.-Ing. Jochen H. Schillerwww.jochenschiller.deMC - 2008 8.3 Motivation  for Mobile IP Routing based on IP destination address , network prefix (e.g. 129.13.42)  determines physical subnet change of physical subnet implies change of IP address  to have a  topological correct address (standard IP) or needs special entries in  the routing tables Specific routes to end-systems? change of all routing table entries to forward packets to the right  destination does not scale with the number of mobile hosts and frequent changes  in the location, security problems Changing the IP-address? adjust the host IP address  depending on the current location almost impossible to find a mobile system , DNS updates take too  long time TCP connections break, security problems
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Prof. Dr.-Ing. Jochen H. Schillerwww.jochenschiller.deMC - 2008 8.4 Requirements  for Mobile IPv4 Transparency mobile end-systems keep their IP address continuation of communication after interruption of link possible point of connection to the fixed network can be changed Compatibility support of the same layer 2 protocols as IP no changes to current end-systems and routers required mobile end-systems can communicate with fixed systems Security authentication of all registration messages Efficiency and scalability only little additional messages to the mobile system required   (connection typically via a low bandwidth radio link) world-wide support of a large number of mobile systems in the whole  Internet
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Prof. Dr.-Ing. Jochen H. Schillerwww.jochenschiller.deMC - 2008 8.5 Terminology Mobile Node (MN)
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This note was uploaded on 11/03/2009 for the course COMPUTERS CS537 taught by Professor Salman during the Spring '09 term at Texas A&M University–Commerce.

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Lecture8 - MobileCommunications...

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