Measurement-based study of IP access in a fixed network | |
| Author | Aurupong Yiwleak |
| Call Number | AIT Thesis no.TC-05-1 |
| Subject(s) | Internet Internet telephony Digital telephone systems |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | Quality of Service is the major challenge of network design. Different services have different behaviors. Traffic behavior and their impact in each service is important to know for network planning purposes. Traffic measurement in real network is the method to find out, improve, and planning in correct way. In this thesis, measurements are taken in TOT network in Sukumvit area. Different tools are used to measure traffic in the network. Internet traffic on aggregated link and subscriber traffic of 20 subscribers are measured in ADSL access network. Subscribed bit rates are grouped into three service classes. The effect of loop length and bandwidth sharing are explored. Usage of Voice over IP is collected to find out its traffic behavior, and penetration and these are compared to ADSL traffic. Self-similarity of aggregated traffic and subscriber traffic is investigated by using variance -time analysis. Analysis results show that Internet traffic has high variation of busy hour traffic and busy hour concentration from day to day while VoIP has quite constant behavior. In studied cases, subscriber loop length does not correlate to subscribed bit rate. Some subscribers of each service class achieved predefined peak rate. Bandwidth sharing in aggregated link is occurred in some time. User perceived rate does not depend on only subscribed bit rate, overall offered traffic and link capacity but it also depends on mean flow volume. In studied cases, penetration of ADSL is 6 subscribers per 100 telephones while VoIP takes 19 subscribers per 100 telephones. Link capacity is calculated to correspond to target of user perceived rate. Self-similarity appears in Internet traffic both in aggregated link and subscriber traffic. |
| Year | 2005 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Telecommunications (TC) |
| Chairperson(s) | Erke, Tapio J. |
| Examination Committee(s) | Ahmed, Kazi M.;Teerapat Sanguankotchakorn |
| Scholarship Donor(s) | TOT Corporation Public Company Limited |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2005 |