| Author | Ngo Le Minh |
| Call Number | AIT Thesis no.CS-05-22 |
| Subject(s) | Computer network protocols--Simulation methods
|
| Note | A thesis submitted in partial fulfillment of the requirements for the
degree of Master of Engineering, School of Advanced Technologies |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. CS-05-22 |
| Abstract | The development of a category of applications that simultaneously connect different users scattered over different locations has fostered a new kind of transport protocols: reliable multicast protocol. Satellite links have been viewed as the potential media for broadcast and multicast communication and are utilized to transmit application data to multiple users simultaneously over very large geographical area. Reliable Multicast protocol for Unidirectional Satellite link (RMUS) is a transport protocol which ensures reliable data transmission to many users and is designed for utilizing unidirectional satellite links. Scalability of reliable multicast protocol is one important criterion that needs to be studied to foresee the performance of the protocol under the pressure of a large number of users. The thesis is aimed at studying the scalability of RMUS. The protocol has been modeled using simulation and the performance data is analyzed to apprehend an insight of the RMUS protocol. Simulation data shows that the implosion phenomenon leads to the increase in the transmission delay and the decline of throughput. Other performance figures such as packet latency and overhead are also impacted. The impact of a large population of users on RMUS with various timeout intervals is investigated where it was found that in order to accommodate larger groups of receivers the timeout setting should be enlarged. A method to compute the minimum backoff interval that is used in setting RMUS timeout is proposed. To keep the protocol intact the method figures out the backoff interval for a multicast network including the scenarios chosen for running RMUS. The injected flow of acknowledgement packets through the Internet is simulated to investigate the impact of backoff interval and traffic on the drop of ACK packets. The minimum backoff is large but it still needs to be increase in the presence of traffic. The loss of ACK packets on the return path to the server leads to the false alarm of the congestion on the satellite link. The adjustment of backoff to increase ACK received by the server can lead to more realistic feedback on the network condition |
| Year | 2005 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. CS-05-22 |
| Type | Thesis |
| School | School of Advanced Technologies (SAT) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Computer Science (CS) |
| Chairperson(s) | Kanchana Kanchanasut; |
| Examination Committee(s) | Guha, Sumanta;Erke, Tapio Juhani; |
| Scholarship Donor(s) | His Majesty the King of Thailand; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2005 |