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QoS Measurement of Internet Real-Time Multimedia Services - Jiang, Schulzrinne (1999) (14 citations) (Correct)
....precision of PSTN clock synchronization is typically on the order of 1ms. 2.7.3 GPS The Global Positioning System is a U.S. satellite based navigational system that provides both location and time services. Among all the methods described, the GPS is the most precise one. The Surveyor project [32] uses GPS to perform highly accurate one way delay measurements. Its project page currently advertises a precision of 50 s for one way delay measurement [31] Its main drawback is the cost of equipment and deployment. The price of GPS receivers has come down to hundreds of dollars for low end ....
Advanced Org. Surveyor home page. http://www.advanced.org/surveyor/.
QoS Measurement of Internet Real-Time Multimedia Services - Jiang, Schulzrinne (1999) (14 citations) (Correct)
....precision of PSTN clock synchronization is typically on the order of 1ms. 2.7.3 GPS The Global Positioning System is a U.S. satellite based navigational system that provides both location and time services. Among all the methods described, the GPS is the most precise one. The Surveyor project [32] uses GPS to perform highly accurate one way delay measurements. Its project page currently advertises a precision of 50 #s for one way delay measurement [31] Its main drawback is the cost of equipment and deployment. The price of GPS receivers has come down to hundreds of dollars for low end ....
Advanced Org. Surveyor home page. http://www.advanced.org/surveyor/.
Application-Level Measurements of Performance on the vBNS - Clark, Jeffay (1999) (4 citations) (Correct)
....by specialized monitoring machines located near some of our test sites. 3. 1 Surveyor Measurements Advanced Network Services and the Common Solutions Group (CSG) as a part of the IP Performance Met rics (IPPM) program, have deployed Surveyor machines to various sites around the USA [1]. Each of these machines is equipped with a global positioning system (GPS) card, which receives time updates via satellite, effectively synchronizing all of the computers clocks. These machines continually collect precise one way delay and loss statistics between each pair of Surveyor machines ....
Advanced Network & Services, Surveyor Home Page, http://www.advanced.org/mm-support/support, Oct. 1998.
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