Route Optimization of Mobile IP over IPv4 - PowerPoint Presentation

Slide1

Route Optimization of Mobile IP over IPv4

Bavineni

Pushpa

Lekha

(916-25-5272)

Lokesh Dasari (916-33-8052)

Bhushan

Bamane

(916-56-0463)Slide2

Road Map

INTRODUCTION

MOBILE IP

ROUTE OPTIMIZATION

UPDATING BINDING CACHES

FOREIGN AGENT SMOOTH HANDOFFS

BENEFITS OF NEMO ROUTE OPTIMIZATION

NON NESTED NEMO ROUTE OPTIMIZATION

CONCLUSION

REFERENCESSlide3

Introduction

What is mobile IP?

Supporting end system mobility while maintaining scalability, efficiency and compatibility in all respects with existing applications an internet protocols.. It requires transparency, compatibility, security, efficiency and scalability.Slide4

TerminologyMobile Node(MN)Home Agent(HA)

Foreign Agent(FA)

Care Of Address(COA)

Correspondent Node(CN

)Slide5

Mobile IP(Triangular Routing in MIP)Slide6

Route Optimization in Mobile IP

We will characterize expansions to the operation of the base Mobile IP convention to consider better routing, so that datagrams can be directed from a Correspondent node to a Mobile Node without setting off to the home agent first.Slide7

Route Optimization message formatsBinding Cache

Binding warning message

Binding Request message

Binding update message

Binding acknowledge messageSlide8

Route Optimization (cont.)The operations of route optimization can be divided into two main parts

Updating binding caches

Managing foreign agent smooth handoffs

Updating binding caches

If any destination Mobile node receiving IP datagrams from correspondent node has a binding cache then the COA can be directly sent to it instead of sending to HA and then tunneling it to MN.Slide9

Route Optimization (cont.)Slide10

Route Optimization (cont.)Managing Foreign agent smooth hand offs

The destination of Mobile Node is changed from one location to another but the CN still is sending the packets to the old FA. This results in data loss until the HA sends the update message to the CN. In order to handle this, there must be communication between old FA and new FA. This is done by using another route optimization message called binding warning which initiates HA to send update message while warning about its new location to obtain new and correct COA from the CN.Slide11

Route Optimization (cont.)Slide12

Benefits of NEMO Route Optimization

Shorter delay

Reduced consumption of overall network resources

Reduced susceptibility to link failure

Greater data efficiency

Reduced processing delay

Avoiding a bottle neck in the home network

Avoid the security policy issue

Avoid the instability and stalemateSlide13

Non Nested NEMO Route Optimization

There are several Network Mobility (NEMO) route optimization mechanisms. Here we explain one of them Non Nested NEMO Route Optimization.

This sends the binding data from Mobile router to any corresponding entity. This corresponding entity can be a correspondent node or correspondent router. The below figure explains the Mobile router and correspondent router route optimization. It can traffic the data either from MNN to CN or CN to MNN.Slide14

Non Nested NEMO Route Optimization (cont.)Slide15

From MNN to CNThe Mobile Router locates the Correspondent Router, establishes a tunnel with that Correspondent Router and sets up a route to the Correspondent Node via the Correspondent Router over the tunnel. Traffic to the Correspondent Node would no longer flow through the Home Agent anymore.

From CN to MNN

The Correspondent Router is on the path of the traffic from the Correspondent Node to the Home Agent. In addition, it has an established tunnel with the current Care-of Address (CoA) of the Mobile Router and is aware of the Mobile Network Prefix(

es

) managed by the Mobile Router. The Correspondent Router can thus intercept packets going to the mobile network, and forward them to the Mobile Router over the established tunnelSlide16

NEMO

A straightforward approach to Route Optimization in NEMO is for the Mobile Router to attempt Route Optimization with a Correspondent Entity

Here we consider the case where the Correspondent Router is a Mobile Router. Thus, Route Optimization is initiated and performed between a Mobile Router and its peer Mobile Router

Such solutions are often posed with a requirement to leave the Mobile Network Nodes untouched, and therefore Mobile Routers handle the optimization management on behalf of the Mobile Network Nodes. Thus, providing Route Optimization fora Visiting Mobile Node is often out of scope for such a scenario because such interaction would require extensions to the Mobile IPv6 protocolSlide17

Non Nested NEMO Route Optimization (cont.)Slide18

o MNN1 to/from MNN2:

The Mobile Router locates the Correspondent Router, establishes a tunnel with that Correspondent Router, and sets up a route to the Mobile Network Node via the Correspondent Router over the tunnel. Traffic to the Mobile Networks Nodes would no longer flow through the Home Agents.Slide19

conclusionThis report discusses about Triangular routing and the way to reduce this problem through Route optimization. It also includes the various Route optimization mechanisms like using the binding cache and binding messages which is an extension to traditional Mobile IP and how successfully the datagram packets are delivered to the Mobile node explaining the scenario of non nested NEMO route optimizationSlide20

ReferencesCharles Perkins and David B. Johnson

. Route Optimization in Mobile IP. Internet Draft, IETF, 6 September 2001.

IP Mobility Support for IPv4,

C. Perkins

, January 2002.

Route Optimization in Mobile IP over IPv4,

Hao (Leo) Chen

, December 2002

https://tools.ietf.org/html/rfc4889