Agrawal Sameer-Ram.R Vivek Shankar

8/12/2019 Agrawal Sameer-Ram.R Vivek Shankar

1/14

INSIGNIA : A QOS

ARCHITECTURAL FRAMEWORK

FOR MANETS

Course:-Software Architecture & Design

Team Members

1.Sameer Agrawal

2.Vivek Shankar Ram.R


2/14

INTRODUCTION

MANETSMobile Ad hoc networks

QOS in MANETS - a technical challenge

INSIGNIA QOS Architectural framework

supports delivery of adaptive services in

MANETS

What are we going to see ?


3/14

THE ARCHITECTURE

Routing

protocol

INSIGNIA

Signaling

Admission

Control

Packet

forwarding

Packet

scheduling

Routing

updates

Locally send/deliver

packets

In-band

signaling MobileSoft state

Routing table control

Channel state

M

A

C

M

A

C

IP packets in

IP packets out

Packet-drop


4/14

CONSTITUENTS OF THE

ARCHITECTURE

STYLE

Abstraction of architectural components from variousspecific architectures.

COMPONENTS From which systems are built

CONNECTIONS

Between the components

CONSTRAINTS

On components, connections and layout.

RATIONALE

describe why the particular architecture is chosen


5/14

STYLE

UNIQUE ARCHITECTURE

FOLLOWS ABSTRACT DATA TYPE STYLE and

REPOSITORY.


6/14

COMPONENTS

ROUTING MODULE Generic set of MANET routing protocols can be plugged in to the

architecture.

Tracks changes, updates routing table and makes that visible to thepacket forwarding component.

INSIGNIA SIGNALING Establishes flow restoration algorithm which respond to dynamic route

changes.

Establishes adaptation algorithm which respond to changes in availablebandwidth.

ADMISSION CONTROL Responsible for allocating bandwidth to flows based on their

minimum/maximum bandwidth.

It is periodically refreshed after allocating resources by a soft statemechanism through the reception of data packets


7/14

COMPONENTS (contd)

PACKET SCHEDULING

Uses a weighted round robin service.

Provides compensation in the case of location dependent conditions

between mobile nodes.

PACKET FORWARDING

Classifies incoming packet and forwards them to the appropriate

module.

MEDIUM ACCESS CONTROL

This framework is transparent to any underlying media access control

protocols.


8/14

INTERACTIONS

ROUTING UPDATES The periodic updates on the routing table

INBAND SIGNALING Carries control information along with the data

packets

Flows/sessions are rapidly established

CONTROL Controls the scheduling of the packets via the packet

scheduling module


9/14

INTERACTIONS (contd)

IP PACKETS IN

These are the input packets to the packet

forwarding module.

IP PACKETS OUT

These are the output packets from the packet

scheduling module.


10/14

CONSTRAINTS

FLOWsequence of packets from a single source toone or more destinations representing a single mediatype. These flows require ADMISSION CONTROL,RESOURCE RESERVATION & MAINTENANCE at all

Intermediate routers.

PERFORMANCErelies on the speed at which therouting protocol can re-compute new routes if noalternative route is cached after topology changes.

SOFT STATErelies on the fact that a source sends datapackets along an existing path.


11/14

RATIONALE

Allows packet audio, video and real time data

applications to specify their maximum & minimum

bandwidth needs.

Plays a central role in resource allocation, restoration

control and session adaptation between communicating

mobile hosts.

Supports adaptive services by establishing and

maintaining reservations for continuous media flows and

micro flows.

In-band signaling are capable of responding to the fast

time scale dynamics in MANETS.


12/14

CONCLUSION

Highly responsive to changes in networktopology, node connectivity and end to end QOSconditions.

Benefits under diverse mobility, traffic, andchannel conditions.

Use of in-band signaling and soft-state resourcemanagement makes the architecture veryefficient, robust and scalable.


13/14


14/14

THANK YOU

Documents

Agrawal Sameer-Ram.R Vivek Shankar