INSIGNIA : A QOS ARCHITECTURAL FRAMEWORK FOR MANETS Course:-Software Architecture & Design Team Members 1.Sameer Agrawal 2.Vivek Shankar Ram.R

INTRODUCTION MANETS – Mobile 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 ?

THE ARCHITECTURE Routing protocol INSIGNIA Signaling Admission Control Packet forwarding Packet scheduling Routing updates Locally send/deliver packets In-band signaling Mobile Soft state Routing table control Channel state MACMAC MACMAC IP packets in IP packets out Packet-drop

CONSTITUENTS OF THE ARCHITECTURE STYLE –Abstraction of architectural components from various specific 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

STYLE UNIQUE ARCHITECTURE FOLLOWS ABSTRACT DATA TYPE STYLE and REPOSITORY.

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 the packet forwarding component. INSIGNIA SIGNALING –Establishes flow restoration algorithm which respond to dynamic route changes. –Establishes adaptation algorithm which respond to changes in available bandwidth. ADMISSION CONTROL –Responsible for allocating bandwidth to flows based on their minimum/maximum bandwidth. –It is periodically refreshed after allocating resources by a soft state mechanism through the reception of data packets

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.

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

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.

CONSTRAINTS FLOW – sequence of packets from a single source to one or more destinations representing a single media type. These flows require ADMISSION CONTROL, RESOURCE RESERVATION & MAINTENANCE at all Intermediate routers. PERFORMANCE relies on the speed at which the routing protocol can re-compute new routes if no alternative route is cached after topology changes. SOFT STATE relies on the fact that a source sends data packets along an existing path.

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.

CONCLUSION Highly responsive to changes in network topology, node connectivity and end to end QOS conditions. Benefits under diverse mobility, traffic, and channel conditions. Use of in-band signaling and soft-state resource management makes the architecture very efficient, robust and scalable.

REFERENCES G-S. Ahn, A. T. Campbell, S-B. Lee, and X. Zhang, ``INSIGNIA: An IP-Based Quality of Service Framework for Mobile ad Hoc Networks”, Journal of Parallel and Distributed Computing 60, 374_406 (2000). ASAP Adaptive QoS Support with Reduced Reservation Overhead in MANETs - Patrick Stuedi, Jianbo Xue, Gustavo Alonso Swiss Federal Institute of Technology (ETHZ) Departement of Computer Science 8092, ETHZentrum,Switzerland {stuedip, xue, A Glance at Quality of Services in Mobile Ad-Hoc Networks Zeinalipour-Yazti Demetrios Department of Computer Science University of California – Riverside 3201 Canyon Crest Dr,Riverside CA 92507, USA

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