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en:projects:details:gio02 [2011/10/13 09:13]
cangiani
en:projects:details:gio02 [2016/06/23 11:26]
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-/* This is the template for project details pages */ 
- 
-/*  
-  The database entry: 
-  "​type"​ is one of the following: phd theses, phd semester, master thesis, master semester, bachelor semester 
-  "​status"​ is one of the following: available, taken, completed (please upgrade accordingly!!!!!!!!!!) ​ 
-  "​by"​ should be filled as soon as the project is taken/​completed 
-  "​completed_dt"​ is the date when the project was completed (YYYY-MM-DD). ​ 
-  "​output_media"​ is the link to the pdf of the project (wiki syntax) 
-  "​table"​ must be "​projects"​ => don't touch it! 
-*/ 
----- dataentry project ---- 
-title : On-line flow measurement for proactive optimization of bandwidth usage 
-contactname:​ Giovanni Cangiani 
-contactmail_mail:​ giovanni.cangiani@epfl.ch 
-contacttel: +41 78 600 00 09 
-contactroom:​ BC149 
-type : master semester 
-status : taken 
-created_dt : 2011-09-20 
-taken_dt : 2011-10-01 
-completed_dt : YYYY-MM-DD 
-by : Laurent Fasnacht 
-output_media : 
-table : projects 
-====== 
-template:​datatemplates:​project 
----- 
- 
-Reliable data distribution over the internet is mostly based on TCP (transmission control protocol). With TCP, the rate of data transmission between two 
-nodes decreases as the distance between the two nodes increases. In a globalized internet, it becomes more and more difficult to make optimal use of the 
-broad bandwidth now commonly available in private households. In the case of one-to-many data distribution,​ large content providers do fix the problem by 
-deploying expensive content delivery networks. 
- 
-The success of novel bandwidth-demanding peer-to-peer applications such as tele-presence and high definition video-conference will have to rely on 
-transmission protocols that make more effective use of the available bandwidth. Forward error correcting codes (FEC) on top of standard UDP protocol have 
-proven to provide reliable and efficient data transmission over long distance and/or lossy networks. In particular, using fountain codes it is possible to 
-saturate any available bandwidth by flooding the connection with an arbitrary number of repair packets. Although optimal for the two peers, this method is 
-not very fair to the users sharing the same link and will end up wasting resources. In fact, the sender transmission rate should not exceed the 
-effective bandwidth linking the two peers. 
- 
-The goal of this project is to develop an efficient method to quickly determine and monitor the actual bandwidth available between two peers in order to 
-make optimal and fair use of it. Measurements will have to be fitted with theoretical models in order to determine the more realistic description of the 
-communication channel at any moment in time during transmission. 
- 
-The computer programs developed for this project will be included in a generic library that is being developed in our laboratory for tunneling network 
-traffic over a transmission channel made reliable and efficient using FEC. The library also provides an easy to use application programming interface 
-(API) that hides to the user all the technicalities including the difficulty of establishing a one-to-one communication channel between nodes that are 
-behind firewalls and NAT routers.