ASSIGNMENT-1
Deepak C.Yerneni
910-98-6251
In this paper the author gives an overview of mobility-enhanced internetworking
protocols and their applicability to mobile and wireless communication architectures.He gives a
brief introduction about the routing system in internet and mentions about various issues with
Internet Protocol(IP) such as the key to scalability of IP internetworking would be the ability to
exchange and maintain routing information based on addresses,Extending IP internetworking for
seamless operation over wireless communication technologies would be a challenge to the
present network protocols and applications.Next he says about Heterogeneous internetworking
routing where he mentions the various operational factors that distinguish mobile,wireless
networks from fixed networks.In the past,mobile wireless networks were seen as homogeneous
radio frequency problems but in the future they may have multiple wireless media devices.
Further he specifies the importance of IP layer in terms of cost benefit in the network.Next he
mentions a two level hierarchy which describes IP routing in the internet.In case of unicasting
routing,exterior gateway protocols are used for routing between autonomous systems and interior
gateway protocols are used with the system.Furthermore he gives examples of both the exterior
and interior gateway protocols and specifies the primary design goals of internet routing
protocols such as minimizing storage,computation and time complexity.The classification of
interior gateway protocols is done using two approaches.First is the pure on-demand routing
approach where routes are reactively established to a given destination and next is the proactive
approach which is more similar in design to IP routing protocols.The potential application of IP
routing solutions are explained which includes network scalability,link capacities and no.of
nodes which is a key issue in developing an architecture design,understanding application
behavior and traffic distribution models should be included as a critical part of interpreting
protocol analysis,degree and type of mobility dynamics anticipated is another core performance
analysis factor.The problem of supporting end user mobility may be solved using network layer
techniques or even higher layer location management techniques.Nextly we study how the
Dynamic Host configuration Protocol(DHCP) works,it’s limitations and how they are
resolved.The Host Routing approach is specified with an example called Local-Area
Mobility(LAM) software available in cisco systems and an advantage of this approach is that
transparent upper layer connectivity to mobile host can be maintained under dymanic
conditions.In the IP mobility support we come across tunnel-based routing in which we have
Mobile IP triangle routing and Mobile IP route optimization where the packets are directly sent
to the Mobile Node without the interruption of the Home Network.Nextly,he emphasizes on the
emerging end systemMobility alternatives such as extending the concept of tunneling to mobile
host,supporting IP networking to cellular end systems.In the future many applications require
additional functionality like end-to-end reliability,flow control which will be provided by
transport-layer protocols,developments in mobile-enhanced transport and application layers are
important for providing a complete set of internet services.
Finally he concluded the paper saying that the key focus is mainly on the emerging
network technologies and components that provide heterogeneous support and interoperability
with IP-based infrastrucutres and applications.