CONTENTS
INTRODUCTION
DESIGN GOALS
RELATED WORKS
FRAMEWORK DESIGN ARCHITECTURE
MODULES
FIN FRAMES
SWITCHING AND LINKING TABLES
DATA FLOW
SYSTEM IMPLIMENTATION
CORE
SOCKET STUB
THE CAPTURE OR INJECTOR
SYSTEM PERFORMANCE AND EVALUATION

AN EXAMPLE

INTRODUCTION

Fins framework is an open source ,flexible network subsystem.

The goal is to facilitate experimentation in wireless research.


Linux is the most viable operating system for these type of experiments.
For the networking purpose kernel interaction is required. Kernel programming is the most challenging operation. It may causes system crash. These issues can solve using fins network.

Fins framework is written in c

Major aspect of experimental wireless networking research is setting up and running in a large scale experiment.

Large  scale experiments involves multiple nodes, commonly laptops, arranged in some relevant  configuration that typically requires physical distance between nodes , and operator per node for control and mobility

Finding and educating and managing these peoples is not an easy task.

CHALLANGES 

The most demanding scenario is an experiment where users need to be interact with devices while moving.

Laptops are common platforms for wireless network  experimentation, they difficult for simultaneously typing and walking .So mobile devices other than laptops are preferred. 

DESIGN GOALS

Works with existing hardware

Userspace development

Supports existing application and protocols

Handheld computing device support

Flexible architecture

RELATED WORKS

Existing tools

X-kernel

It focuses on performance 

It sacrifices flexibility of speed

It does not  support existing applications.

Lack of support for modern versions of  linux and android.

Click router

It was designed to allow  users to create flexible routers.

It is focused on router testing and it is not interact with API

Using click nodes it is used as routers and build custom applications that have interact with  click platform  directly to send and receiving data.

Autonomic network architecture  (ANA)

It is similar to fins network  such as it support mobile devices.

Main difference is ANA is focused only on developing new ideas and protocols.

It is not support existing protocol.

SYSTEM ARCHITECTURE

The fins framework composed of entities known as modules.

It is communicate via a multiplexing entity called switch.

Linking table is like a routing table.

MODULES

Data module

Eg:tcp,udp,arp

Non data module

Eg: Logging module

Stub

Eg: Device drivers and network  sockets

FINS FRAMES

Data

control

SWITCH AND LINKING TABLE

All of the modules within framework  communicate via the switch.

The path of communication through the switch is controlled by the linking table.

DATAFLOW

Ingress network-to-application traffic

Egress application-to-network traffic

Module-to-module control traffic

SYSTEM IMPLIMENTATION

THERE THREE MAJOR PARTS FOR IMPLIMENTING

Fins daemon (core)

Socket stub

Capturer  or injector

ONE MINOR PART

Remote translation  module(rtm)

THE CORE

Core part contains modules and switch

The modules and switches communicate using pairs of unidirectional queues, one pair for each module

SOCKET STUB

In order to support legacy applications, the socket stub is  implemented as two separate components

Fins framework sockets calls interceptor

Fins framework socket daemon

THE CAPTURER / INJECTOR

The MAC/PHY stub module connects to the network  and is portable across platforms

MAC/PHY  stub thread

Capturing process

Injecting process

SYSTEM PERFORMANCE AND EVALUATION

Support for daily use

Simple research scenario

Determining bounds of performance and is conducting using traffic generation tools

APPLICATION LAYER PERFORMANCE

THREE SPECIFIC TESTS SCENARIOS

File downloading

HTTP : 9 MB/S

FTP     : 7MB/S

Video streaming

45 – min HD video without interruption

Real-time communication

UDP- Successful

TCP- Does not meet the goal, this is an area of investigation for     

 future work.

EXAMPLE

During 2013  a group of peoples conducting an experiment using fins framework

Participants created a ring shaped network

The data is send both left and right  direction, the network behaviour is same. So the experiment is successful.

PERFORMANCE TESTING

Tested both TCP and UDP over wireless or wired network.

Netgear n300 wireless router for  testing.

Each test consist of sending a single datastream  for 3 mins from one node to another .

Each test is at least 50 times.

As per the experiment FINS framework

is achieved the target throughput 

of ieee 802.11b,11 MB/S .

So the result shows  that the FINS 

framework has exceeded  our 

performance  targets. So it is good 

for research purposes.

CONCLUSION

Fins framework is an opensource , userspace networking subsystem designed and built for linux and linux based, like google android.

Primary goal of fins framework is  to make wireless networking research easier by moving network functionality to userspace and building a platform for mobile devices.