Interim Master Thesis Talk. Extension of a DiffServ enabled IP core network for delivering QoS to the xdsl access. Sandeep Misra

Transcription

1 Interim Master Thesis Talk Extension of a DiffServ enabled IP core network for delivering QoS to the xdsl access By : Guide : Prof. Hußmann

2 AQUILA (IST ) Adaptive Resource Control for QoS Using an IP-based Layered Architecture st.inf..inf.tu-dresden.de/aquila/

3 Outline & AQUILA Resource Reservation Protocols Implementation Scenarios Network Address Translation Current Status

4 Quality of Service Current traffic flow : Best effort Requirements : 1. Traffic Classification 2. Real Time Traffic 3. IP Convergence User is paying for the service Need for QoS

5 AQUILA : Introduction Based on the DiffServ network concept Introduces Traffic Classes Introduces Admission Control Introduces Resource Control Only for Core Network Is Scalable

6 AQUILA Architecture Resource Control Layer Resource Control resources Resource Control Agent resources Admission Control End-user Application Toolkit QoS Request QoS Request Network Admission Control Agent Settings Edge Core QoS Request Core Core Admission Control Agent Settings Edge Network

7 AQUILA on n/w? Resource Control Layer QoS Request Settings Edge Core Why Not Core Extend AQUILA Core to Network? Settings Edge Network Network Real Time Traffic FTP Traffic

8 Protocol Requirements Guarantees QOS Implementation should exist Should be widely supported Scalability, not a problem Suitable for networks Low Bandwidth Fast Signaling

9 Reservation Protocols RSVP Resource Reservation Protocol SRP Scalable Resource Reservation Protocol FIRST Flow Initiation and Reservation Tree DRP Dynamic Sender Initiated Reservation Protocol Boomerang A simple protocol for Resource Reservation YESSIR Yet another Sender Session Internet Reservation

10 Comparison : Headers YESSIR RTP Boomerang RSVP RSVP UDP ICMP UDP IP IP IP YESSIR Header Boomerang Header RSVP Header

11 Comparison : Properties RSVP YESSIR Boomerang Initiator Receiver Sender Sender Flow Setup Two Messages One Message One Message Setup at router Refresh Fast Fast Faster Faster Faster Faster Bandwidth Low Lower Lower Implementatio n Scalable Yes No Yes Yes Yes Yes Support Wide No No

12 Implementation Scenario : RSVP Encapsulation Resource Control Layer Edge Settings Core Core Core Edge Settings Network Network RSVP RESV RSVP PATH

13 Implementation Scenario : RSVP Termination Resource Control Layer Edge Settings Core Core Core Edge Settings Network Network RSVP RESV RSVP PATH

14 xdsl : Overview HDSL : High-bit rate Digital Subscriber Line Symmetric Up to 2 Mbps SDSL : Symmetric Digital Subscriber Line Symmetric Up to 3 Mbps ADSL : Asymmetric Digital Subscriber Line Asymmetric Downstream : up to 9 Mbps Upstream : 128 kbps upstream

15 AQUILA ADSL : Technology n Simultaneous voice and data use of a single copper connection n Voice call, Fax etc use the normal 0-4kHZ n Higher frequencies to pass the data traffic n Motivation n Protocols n Scenarios n xdsl n NAT n Status n Summary n Discussion

16 NAT : Network Address Translator translates local IP header address to unique IP Does not look for IP address in payload Plug in, in NAT for RSVP Local LAN ADSL ISP

17 Implementation Scenarios & RSVP on different systems Host + RSVP xdsl AEA & RSVP on same system Host + RSVP xdsl + AEA AEA : AQUILA Extension for n/w

18 Current Status Between Two Systems Solaris Host + RSVP Between More than Two Systems xdsl + AEA Solaris Host + RSVP Linux Destination + RSVP xdsl + AEA PATH RESV

19 AEA Implementation RSVP AEA EAT AEA installed as on edge router

20 Summary Complete : Theoretical Part Research Planning Installation of xdsl router and RSVP To Be Done : Implementation Development of AEA Tests

21 Questions & Discussion

22 AQUILA (IST ) Adaptive Resource Control for QoS Using an IP-based Layered Architecture Thank you for your attention! st.inf..inf.tu-dresden.de/aquila/