QoS over Winsock 2 via ATM
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
The aim of the masters thesis was to investigate the properties of Winsock 2, demonstrate an application requesting QoS via Winsock 2 over ATM and analyze it from a user perspective. An application requesting QoS via Winsock 2 over ATM has been demonstrated. Analyzing QoS from a user perspective is a difficult task, especially translating it into technical specifications. A useful method used for analyzing QoS from a user perspective is Round Trip Time (RTT) measurements between two end statations (PC's) communicating over an ATM link. This has been carried out with other programs running parallel to the test program (measuring the RTT) to study the effects that these programs may have on the RTT and eventually the end users perspective of QoS. Other tests performed include studying CPU utilization as a function of the receiving data rate. One application transmitts at different data rates to another application on another end station (PC) over the ATM link and the CPU utilization on the receiving end station is studied.
To run real time applications (voice, video, etc) and maintain good quality with minimal delay over an ATM link, these programs should be given high priority by the Operating System or other mechanism to minimize delay. Disk I/O should also be kept minimal, as this could affect the delay or overall quality of the delay sensitive programs. A draw back that many application programmers will experience whilst writing programs for ATM, is the number of QoS parameters that have to be set.
Place, publisher, year, edition, pages
IdentifiersURN: urn:nbn:se:kth:diva-96662OAI: oai:DiVA.org:kth-96662DiVA: diva2:531909
Subject / course
Master of Science in Engineering - Electrical Engineering
1997-12-12, seminar room "Väljaren", Isafjordsgatan 22, Kista, 13:00 (English)
Maguire Jr., Gerald Q., professorAbrahamsson, Leif
Maguire Jr., Gerald Q., professor