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Author:Paaso, Juho
Title:Guaranteed access over consumer-level connections
Luotettava yhteys epäluotettavien liittymien yli
Publication type:Master's thesis
Publication year:2011
Pages:[7] + 50      Language:   eng
Department/School:Tietoliikenne- ja tietoverkkotekniikan laitos
Main subject:Tietoverkkotekniikka   (S-38)
Supervisor:Manner, Jukka
Instructor:Mäkelä, Antti
Electronic version URL: http://urn.fi/URN:NBN:fi:aalto-201207022753
OEVS:
Electronic archive copy is available via Aalto Thesis Database.
Instructions

Reading digital theses in the closed network of the Aalto University Harald Herlin Learning Centre

In the closed network of Learning Centre you can read digital and digitized theses not available in the open network.

The Learning Centre contact details and opening hours: https://learningcentre.aalto.fi/en/harald-herlin-learning-centre/

You can read theses on the Learning Centre customer computers, which are available on all floors.

Logging on to the customer computers

  • Aalto University staff members log on to the customer computer using the Aalto username and password.
  • Other customers log on using a shared username and password.

Opening a thesis

  • On the desktop of the customer computers, you will find an icon titled:

    Aalto Thesis Database

  • Click on the icon to search for and open the thesis you are looking for from Aaltodoc database. You can find the thesis file by clicking the link on the OEV or OEVS field.

Reading the thesis

  • You can either print the thesis or read it on the customer computer screen.
  • You cannot save the thesis file on a flash drive or email it.
  • You cannot copy text or images from the file.
  • You cannot edit the file.

Printing the thesis

  • You can print the thesis for your personal study or research use.
  • Aalto University students and staff members may print black-and-white prints on the PrintingPoint devices when using the computer with personal Aalto username and password. Color printing is possible using the printer u90203-psc3, which is located near the customer service. Color printing is subject to a charge to Aalto University students and staff members.
  • Other customers can use the printer u90203-psc3. All printing is subject to a charge to non-University members.
Location:P1 Ark Aalto  1238   | Archive
Keywords:networking
network programming
guaranteed access
IP routing
UDP tunneling
Redundant Array of Independent Internet Connections (RAIIC)
Service Level Agreement (SLA)
tietoverkkotekniikka
luotettava yhteys
Mobile IPv4
IP-reititys
UDP-tunnelointi
RAIIC
SLA
Abstract (eng): The scope of this thesis was providing guaranteed access over an array of unguaranteed and cheap consumer-grade connections.
We tested how well high-availability access can be created with Redundant Array of Independent Internet Connections (RAIIC).
In RAIIC, multiple unreliable connections are bundled together.
Customer traffic is transferred on one connection at a time.
State of the current connection is constantly monitored.
If connectivity deteriorates, the system switches the traffic onto another unreliable connection.
Connection switching should be invisible to the communicating nodes.

For this study we developed a Mobile IP based implementation.
We were able to test the concept on running code.
We measured how the connection switching affects the end-user experience and the results seemed quite promising.
On TCP the switching corresponded to 1 - 1.5 second outage, which is considered to be well tolerable.
VoIP quality remained "Fair" in Mean Opinion Score metrics.
Abstract (fin): Tässä opinnäytetyössä tutkitaan konseptia Redundant Array of Independent Internet Connections (RAIIC), jossa ajatuksena on tarjota luotettava yhteys usean halvan ja epäluotettavan liittymän yli.
Yhtä epäluotettavaa liittymää käytetään kerrallaan tämän tilaa jatkuvasti tarkkaillen.
Jos yhteyden tila heikkenee, järjestelmä siirtää liikenteen toiselle liittymälle ilman että kommunikoivat osapuolet huomaavat muutosta.
Näin ollen voidaan tarjota virtuaalinen, luotettava bittiputki halpojen yhteyksien yli.

Tutkimusta varten kehitimme Mobile IP -protokollaan pohjautuvan toteutuksen.
Tällä pääsimme testaamaan konseptia oikeassa tietoverkossa.
Mittasimme, miten liittymän vaihtaminen vaikuttaa loppukäyttäjän kokemaan palvelunlaatuun.
TCP-protokollalla liittymän vaihto vastasi palvelussa 1 - 1.5 sekunnin katkoa, joka on vielä hyvinkin siedettävä.
VoIP-palvelun laatu ei laskenut alle kohtalaisen tason (Mean Opinion Score -asteikolla "Fair").
ED:2012-02-01
INSSI record number: 43901
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